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path: root/drivers/usb
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2014-03-31xhci: Fix resume issues on Renesas chips in Samsung laptopsSarah Sharp
commit 1aa9578c1a9450fb21501c4f549f5b1edb557e6d upstream. Don Zickus <dzickus@redhat.com> writes: Some co-workers of mine bought Samsung laptops that had mostly usb3 ports. Those ports did not resume correctly (the driver would timeout communicating and fail). This led to frustration as suspend/resume is a common use for laptops. Poking around, I applied the reset on resume quirk to this chipset and the resume started working. Reloading the xhci_hcd module had been the temporary workaround. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Reported-by: Don Zickus <dzickus@redhat.com> Tested-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-22Revert "xhci 1.0: Limit arbitrarily-aligned scatter gather."Mathias Nyman
commit e2ed511400d41e0d136089d5a55ceab57c6a2426 upstream. This reverts commit 247bf557273dd775505fb9240d2d152f4f20d304. This commit, together with commit 3804fad45411b48233b48003e33a78f290d227c8 "USBNET: ax88179_178a: enable tso if usb host supports sg dma" were origially added to get xHCI 1.0 hosts and usb ethernet ax88179_178a devices working together with scatter gather. xHCI 1.0 hosts pose some requirement on how transfer buffers are aligned, setting this requirement for 1.0 hosts caused USB 3.0 mass storage devices to fail more frequently. USB 3.0 mass storage devices used to work before 3.14-rc1. Theoretically, the TD fragment rules could have caused an occasional disk glitch. Now the devices *will* fail, instead of theoretically failing. >From a user perspective, this looks like a regression; the USB device obviously fails on 3.14-rc1, and may sometimes silently fail on prior kernels. The proper soluition is to implement the TD fragment rules required, but for now this patch needs to be reverted to get USB 3.0 mass storage devices working at the level they used to. Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-22usb: Make DELAY_INIT quirk wait 100ms between Get Configuration requestsJulius Werner
commit d86db25e53fa69e3e97f3b55dd82a70689787c5d upstream. The DELAY_INIT quirk only reduces the frequency of enumeration failures with the Logitech HD Pro C920 and C930e webcams, but does not quite eliminate them. We have found that adding a delay of 100ms between the first and second Get Configuration request makes the device enumerate perfectly reliable even after several weeks of extensive testing. The reasons for that are anyone's guess, but since the DELAY_INIT quirk already delays enumeration by a whole second, wating for another 10th of that isn't really a big deal for the one other device that uses it, and it will resolve the problems with these webcams. Signed-off-by: Julius Werner <jwerner@chromium.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-22usb: Add device quirk for Logitech HD Pro Webcams C920 and C930eJulius Werner
commit e0429362ab15c46ea4d64c3f8c9e0933e48a143a upstream. We've encountered a rare issue when enumerating two Logitech webcams after a reboot that doesn't power cycle the USB ports. They are spewing random data (possibly some leftover UVC buffers) on the second (full-sized) Get Configuration request of the enumeration phase. Since the data is random this can potentially cause all kinds of odd behavior, and since it occasionally happens multiple times (after the kernel issues another reset due to the garbled configuration descriptor), it is not always recoverable. Set the USB_DELAY_INIT quirk that seems to work around the issue. Signed-off-by: Julius Werner <jwerner@chromium.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-12usb: ohci: use amd_chipset_type to filter for SB800 prefetchHuang Rui
commit 02c123ee99c793f65af2dbda17d5fe87d448f808 upstream. Commit "usb: pci-quirks: refactor AMD quirk to abstract AMD chipset types" introduced a new AMD chipset type to filter AMD platforms with different chipsets. According to a recent thread [1], this patch updates SB800 prefetch routine in AMD PLL quirk. And make it use the new chipset type to represent SB800 generation. [1] http://marc.info/?l=linux-usb&m=138012321616452&w=2 Signed-off-by: Huang Rui <ray.huang@amd.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-12usb: ehci: use amd_chipset_type to filter for usb subsystem hang bugHuang Rui
commit 3ad145b62a15c86150dd0cc229a39a3120d462f9 upstream. Commit "usb: pci-quirks: refactor AMD quirk to abstract AMD chipset types" introduced a new AMD chipset type to filter AMD platforms with different chipsets. According to a recent thread [1], this patch updates USB subsystem hang symptom quirk which is observed on AMD all SB600 and SB700 revision 0x3a/0x3b. And make it use the new chipset type to represent. [1] http://marc.info/?l=linux-usb&m=138012321616452&w=2 Signed-off-by: Huang Rui <ray.huang@amd.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-12usb: pci-quirks: refactor AMD quirk to abstract AMD chipset typesHuang Rui
commit 22b4f0cd1d4d98f50213e9a37ead654e80b54b9d upstream. This patch abstracts out a AMD chipset type which includes southbridge generation and its revision. When os excutes usb_amd_find_chipset_info routine to initialize AMD chipset type, driver will know which kind of chipset is used. This update has below benifits: - Driver is able to confirm which southbridge generations and their revision are used, with chipset detection once. - To describe chipset generations with enumeration types brings better readability. - It's flexible to filter AMD platforms to implement new quirks in future. Signed-off-by: Huang Rui <ray.huang@amd.com> Cc: Andiry Xu <andiry.xu@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-05USB: ftdi_sio: add Cressi Leonardo PIDJoerg Dorchain
commit 6dbd46c849e071e6afc1e0cad489b0175bca9318 upstream. Hello, the following patch adds an entry for the PID of a Cressi Leonardo diving computer interface to kernel 3.13.0. It is detected as FT232RL. Works with subsurface. Signed-off-by: Joerg Dorchain <joerg@dorchain.net> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-05usb: ehci: fix deadlock when threadirqs option is usedStanislaw Gruszka
commit a1227f3c1030e96ebc51d677d2f636268845c5fb upstream. ehci_irq() and ehci_hrtimer_func() can deadlock on ehci->lock when threadirqs option is used. To prevent the deadlock use spin_lock_irqsave() in ehci_irq(). This change can be reverted when hrtimer callbacks become threaded. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-05USB: EHCI: add delay during suspend to prevent erroneous wakeupsAlan Stern
commit 3e8d6d85adedc59115a564c0a54b36e42087c4d9 upstream. High-speed USB connections revert back to full-speed signalling when the device goes into suspend. This takes several milliseconds, and during that time it's not possible to tell reliably whether the device has been disconnected. On some platforms, the Wake-On-Disconnect circuitry gets confused during this intermediate state. It generates a false wakeup signal, which can prevent the controller from going to sleep. To avoid this problem, this patch adds a 5-ms delay to the ehci_bus_suspend() routine if any ports have to switch over to full-speed signalling. (Actually, the delay was already present for devices using a particular kind of PHY power management; the patch merely causes the delay to be used more widely.) Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reviewed-by: Peter Chen <Peter.Chen@freescale.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-05USB: serial: option: blacklist interface 4 for Cinterion PHS8 and PXS8Aleksander Morgado
commit 12df84d4a80278a5b1abfec3206795291da52fc9 upstream. This interface is to be handled by the qmi_wwan driver. CC: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> CC: Christian Schmiedl <christian.schmiedl@gemalto.com> CC: Nicolaus Colberg <nicolaus.colberg@gemalto.com> CC: David McCullough <david.mccullough@accelecon.com> Signed-off-by: Aleksander Morgado <aleksander@aleksander.es> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-05usb: gadget: bcm63xx_udc: fix build failure on DMA channel codeFlorian Fainelli
commit 2d1f7af3d60dd09794e0738a915d272c6c27abc5 upstream. Commit 3dc6475 ("bcm63xx_enet: add support Broadcom BCM6345 Ethernet") changed the ENETDMA[CS] macros such that they are no longer macros, but actual register offset definitions. The bcm63xx_udc driver was not updated, and as a result, causes the following build error to pop up: CC drivers/usb/gadget/u_ether.o drivers/usb/gadget/bcm63xx_udc.c: In function 'iudma_write': drivers/usb/gadget/bcm63xx_udc.c:642:24: error: called object '0' is not a function drivers/usb/gadget/bcm63xx_udc.c: In function 'iudma_reset_channel': drivers/usb/gadget/bcm63xx_udc.c:698:46: error: called object '0' is not a function drivers/usb/gadget/bcm63xx_udc.c:700:49: error: called object '0' is not a function Fix this by updating usb_dmac_{read,write}l and usb_dmas_{read,write}l to take an extra channel argument, and use the channel width (ENETDMA_CHAN_WIDTH) to offset the register we want to access, hence doing again what the macro implicitely did for us. Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Jonas Gorski <jogo@openwrt.org> Signed-off-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-03-05usb: chipidea: need to mask when writting endptflush and endptprimeMatthieu CASTET
commit 5bf5dbeda2454296f1984adfbfc8e6f5965ac389 upstream. ENDPTFLUSH and ENDPTPRIME registers are set by software and clear by hardware. There is a bit for each endpoint. When we are setting a bit for an endpoint we should make sure we do not touch other endpoint bit. There is a race condition if the hardware clear the bit between the read and the write in hw_write. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com> Tested-by: Michael Grzeschik <mgrzeschik@pengutronix.de> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
2014-02-22Revert "usbcore: set lpm_capable field for LPM capable root hubs"Sarah Sharp
commit 140e3026a57ab7d830dab2f2c57796c222db0ea9 upstream. Commit 9df89d85b407690afa46ddfbccc80bec6869971d "usbcore: set lpm_capable field for LPM capable root hubs" was created under the assumption that all USB host controllers should have USB 3.0 Link PM enabled for all devices under the hosts. Unfortunately, that's not the case. The xHCI driver relies on knowledge of the host hardware scheduler to calculate the LPM U1/U2 timeout values, and it only sets lpm_capable to one for Intel host controllers (that have the XHCI_LPM_SUPPORT quirk set). When LPM is enabled for some Fresco Logic hosts, it causes failures with a AgeStar 3UBT USB 3.0 hard drive dock: Jan 11 13:59:03 sg-laptop kernel: usb 3-1: new SuperSpeed USB device number 2 using xhci_hcd Jan 11 13:59:03 sg-laptop kernel: usb 3-1: Set SEL for device-initiated U1 failed. Jan 11 13:59:08 sg-laptop kernel: usb 3-1: Set SEL for device-initiated U2 failed. Jan 11 13:59:08 sg-laptop kernel: usb-storage 3-1:1.0: USB Mass Storage device detected Jan 11 13:59:08 sg-laptop mtp-probe[613]: checking bus 3, device 2: "/sys/devices/pci0000:00/0000:00:1c.3/0000:04:00.0/usb3/3-1" Jan 11 13:59:08 sg-laptop mtp-probe[613]: bus: 3, device: 2 was not an MTP device Jan 11 13:59:08 sg-laptop kernel: scsi6 : usb-storage 3-1:1.0 Jan 11 13:59:13 sg-laptop kernel: usb 3-1: Set SEL for device-initiated U1 failed. Jan 11 13:59:18 sg-laptop kernel: usb 3-1: Set SEL for device-initiated U2 failed. Jan 11 13:59:18 sg-laptop kernel: usbcore: registered new interface driver usb-storage Jan 11 13:59:40 sg-laptop kernel: usb 3-1: reset SuperSpeed USB device number 2 using xhci_hcd Jan 11 13:59:41 sg-laptop kernel: usb 3-1: device descriptor read/8, error -71 Jan 11 13:59:41 sg-laptop kernel: usb 3-1: reset SuperSpeed USB device number 2 using xhci_hcd Jan 11 13:59:46 sg-laptop kernel: usb 3-1: device descriptor read/8, error -110 Jan 11 13:59:46 sg-laptop kernel: scsi 6:0:0:0: Device offlined - not ready after error recovery Jan 11 13:59:46 sg-laptop kernel: usb 3-1: USB disconnect, device number 2 lspci for the affected host: 04:00.0 0c03: 1b73:1000 (rev 04) (prog-if 30 [XHCI]) Subsystem: 1043:1039 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 19 Region 0: Memory at dd200000 (32-bit, non-prefetchable) [size=64K] Capabilities: [50] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [80] Express (v1) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <2us, L1 <32us ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend- LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 unlimited, L1 unlimited ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Kernel driver in use: xhci_hcd Kernel modules: xhci_hcd The commit was backported to stable kernels, and will need to be reverted there as well. Signed-off-by: Sarah Sharp <sarah.a.sharp@intel.com> Reported-by: Sergey Galanov <sergey.e.galanov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22Revert "usb: xhci: Link TRB must not occur within a USB payload burst"Sarah Sharp
commit 3d4b81eda2211f32886e2978daf6f39885042fc4 upstream. This reverts commit 35773dac5f862cb1c82ea151eba3e2f6de51ec3e. It's a hack that caused regressions in the usb-storage and userspace USB drivers that use usbfs and libusb. Commit 70cabb7d992f "xhci 1.0: Limit arbitrarily-aligned scatter gather." should fix the issues seen with the ax88179_178a driver on xHCI 1.0 hosts, without causing regressions. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22Revert "xhci: Avoid infinite loop when sg urb requires too many trbs"Sarah Sharp
commit 9cf00d91708221ff2d8a11143315f7ebab8d5da8 upstream. This reverts commit d6c9ea9069af684358efedcaf2f2f687f51c58ee. We are ripping out commit 35773dac5f862cb1c82ea151eba3e2f6de51ec3e "usb: xhci: Link TRB must not occur within a USB payload burst" because it's a hack that caused regressions in the usb-storage and userspace USB drivers that use usbfs and libusb. This commit attempted to fix the issues with that patch. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22Revert "xhci: Set scatter-gather limit to avoid failed block writes."Sarah Sharp
commit 1386ff75797a187df324062fb4e929152392da88 upstream. This reverts commit f2d9b991c549f159dc9ae81f77d8206c790cbfee. We are ripping out commit 35773dac5f862cb1c82ea151eba3e2f6de51ec3e "usb: xhci: Link TRB must not occur within a USB payload burst" because it's a hack that caused regressions in the usb-storage and userspace USB drivers that use usbfs and libusb. This commit attempted to fix the issues with that patch. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22xhci 1.0: Limit arbitrarily-aligned scatter gather.Sarah Sharp
commit 247bf557273dd775505fb9240d2d152f4f20d304 upstream. xHCI 1.0 hosts have a set of requirements on how to align transfer buffers on the endpoint rings called "TD fragment" rules. When the ax88179_178a driver added support for scatter gather in 3.12, with commit 804fad45411b48233b48003e33a78f290d227c8 "USBNET: ax88179_178a: enable tso if usb host supports sg dma", it broke the device under xHCI 1.0 hosts. Under certain network loads, the device would see an unexpected short packet from the host, which would cause the device to stop sending ethernet packets, even through USB packets would still be sent. Commit 35773dac5f86 "usb: xhci: Link TRB must not occur within a USB payload burst" attempted to fix this. It was a quick hack to partially implement the TD fragment rules. However, it caused regressions in the usb-storage layer and userspace USB drivers using libusb. The patches to attempt to fix this are too far reaching into the USB core, and we really need to implement the TD fragment rules correctly in the xHCI driver, instead of continuing to wallpaper over the issues. Disable arbitrarily-aligned scatter-gather in the xHCI driver for 1.0 hosts. Only the ax88179_178a driver checks the no_sg_constraint flag, so don't set it for 1.0 hosts. This should not impact usb-storage or usbfs behavior, since they pass down max packet sized aligned sg-list entries (512 for USB 2.0 and 1024 for USB 3.0). Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Mark Lord <mlord@pobox.com> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Bjørn Mork <bjorn@mork.no> Cc: Freddy Xin <freddy@asix.com.tw> Cc: Ming Lei <ming.lei@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22USB: simple: add Dynastream ANT USB-m Stick device supportKristóf Ralovich
commit 2240c365108adbc4100a55654a5707e8e877a401 upstream. Add support for ANT USB-m Stick from Dynastream Innovations, by listing USB pid [34366.944805] usb 6-1: New USB device found, idVendor=0fcf, idProduct=1009 [34366.944817] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [34366.944824] usb 6-1: Product: ANT USB-m Stick [34366.944831] usb 6-1: Manufacturer: Dynastream Innovations Device reported (https://code.google.com/p/antpm/issues/detail?id=5) to work through: $ modprobe usbserial vendor=0x0fcf product=0x1009 Signed-off-by: Kristóf Ralovich <kristof.ralovich@gmail.com> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22usb: option: blacklist ZTE MF667 net interfaceRaymond Wanyoike
commit 3635c7e2d59f7861afa6fa5e87e2a58860ff514d upstream. Interface #5 of 19d2:1270 is a net interface which has been submitted to the qmi_wwan driver so consequently remove it from the option driver. Signed-off-by: Raymond Wanyoike <raymond.wanyoike@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22usb-storage: enable multi-LUN scanning when neededAlan Stern
commit 823d12c95c666fa7ab7dad208d735f6bc6afabdc upstream. People sometimes create their own custom-configured kernels and forget to enable CONFIG_SCSI_MULTI_LUN. This causes problems when they plug in a USB storage device (such as a card reader) with more than one LUN. Fortunately, we can tell fairly easily when a storage device claims to have more than one LUN. When that happens, this patch asks the SCSI layer to probe all the LUNs automatically, regardless of the config setting. The patch also updates the Kconfig help text for usb-storage, explaining that CONFIG_SCSI_MULTI_LUN may be necessary. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Thomas Raschbacher <lordvan@lordvan.com> CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net> CC: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22usb-storage: restrict bcdDevice range for Super Top in Cypress ATACBAlan Stern
commit a9c143c82608bee2a36410caa56d82cd86bdc7fa upstream. The Cypress ATACB unusual-devs entry for the Super Top SATA bridge causes problems. Although it was originally reported only for bcdDevice = 0x160, its range was much larger. This resulted in a bug report for bcdDevice 0x220, so the range was capped at 0x219. Now Milan reports errors with bcdDevice 0x150. Therefore this patch restricts the range to just 0x160. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: Milan Svoboda <milan.svoboda@centrum.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22usb-storage: add unusual-devs entry for BlackBerry 9000Alan Stern
commit c5637e5119c43452a00e27c274356b072263ecbb upstream. This patch adds an unusual-devs entry for the BlackBerry 9000. This fixes Bugzilla #22442. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Moritz Moeller-Herrmann <moritz-kernel@moeller-herrmann.de> Tested-by: Moritz Moeller-Herrmann <moritz-kernel@moeller-herrmann.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22USB: ftdi_sio: add Tagsys RFID Reader IDsUlrich Hahn
commit 76f24e3f39a1a94bab0d54e98899d64abcd9f69c upstream. Adding two more IDs to the ftdi_sio usb serial driver. It now connects Tagsys RFID readers. There might be more IDs out there for other Tagsys models. Signed-off-by: Ulrich Hahn <uhahn@eanco.de> Cc: Johan Hovold <johan@hovold.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22usb: ftdi_sio: add Mindstorms EV3 console adapterBjørn Mork
commit 67847baee056892dc35efb9c3fd05ae7f075588c upstream. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-22usb: qcserial: add Netgear Aircard 340UBjørn Mork
commit f948dcf9e9973c05d957bc65b3185682f45feda3 upstream. This device was mentioned in an OpenWRT forum. Seems to have a "standard" Sierra Wireless ifnumber to function layout: 0: qcdm 2: nmea 3: modem 8: qmi 9: storage Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: core: get config and string descriptors for unauthorized devicesThomas Pugliese
commit 83e83ecb79a8225e79bc8e54e9aff3e0e27658a2 upstream. There is no need to skip querying the config and string descriptors for unauthorized WUSB devices when usb_new_device is called. It is allowed by WUSB spec. The only action that needs to be delayed until authorization time is the set config. This change allows user mode tools to see the config and string descriptors earlier in enumeration which is needed for some WUSB devices to function properly on Android systems. It also reduces the amount of divergent code paths needed for WUSB devices. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06xhci: Set scatter-gather limit to avoid failed block writes.Sarah Sharp
commit f2d9b991c549f159dc9ae81f77d8206c790cbfee upstream. Commit 35773dac5f862cb1c82ea151eba3e2f6de51ec3e "usb: xhci: Link TRB must not occur within a USB payload burst" attempted to fix an issue found with USB ethernet adapters, and inadvertently broke USB storage devices. The patch attempts to ensure that transfers never span a segment, and rejects transfers that have more than 63 entries (or possibly less, if some entries cross 64KB boundaries). usb-storage limits the maximum transfer size to 120K, and we had assumed the block layer would pass a scatter-gather list of 4K entries, resulting in no more than 31 sglist entries: http://marc.info/?l=linux-usb&m=138498190419312&w=2 That assumption was wrong, since we've seen the driver reject a write that was 218 sectors long (of probably 512 bytes each): Jan 1 07:04:49 jidanni5 kernel: [ 559.624704] xhci_hcd 0000:00:14.0: Too many fragments 79, max 63 ... Jan 1 07:04:58 jidanni5 kernel: [ 568.622583] Write(10): 2a 00 00 06 85 0e 00 00 da 00 Limit the number of scatter-gather entries to half a ring segment. That should be margin enough in case some entries cross 64KB boundaries. Increase the number of TRBs per segment from 64 to 256, which should result in ring segments fitting on a 4K page. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Reported-by: jidanni@jidanni.org References: http://bugs.debian.org/733907 Fixes: 35773dac5f86 ('usb: xhci: Link TRB must not occur within a USB payload burst') Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06xhci: Avoid infinite loop when sg urb requires too many trbsBen Hutchings
commit d6c9ea9069af684358efedcaf2f2f687f51c58ee upstream. Currently prepare_ring() returns -ENOMEM if the urb won't fit into a single ring segment. usb_sg_wait() treats this error as a temporary condition and will keep retrying until something else goes wrong. The number of retries should be limited in usb_sg_wait(), but also prepare_ring() should not return an error code that suggests it might be worth retrying. Change it to -EINVAL. Reported-by: jidanni@jidanni.org References: http://bugs.debian.org/733907 Fixes: 35773dac5f86 ('usb: xhci: Link TRB must not occur within a USB payload burst') Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: ehci: add freescale imx28 special write register methodPeter Chen
commit feffe09f510c475df082546815f9e4a573f6a233 upstream. According to Freescale imx28 Errata, "ENGR119653 USB: ARM to USB register error issue", All USB register write operations must use the ARM SWP instruction. So, we implement a special ehci_write for imx28. Discussion for it at below: http://marc.info/?l=linux-usb&m=137996395529294&w=2 Without this patcheset, imx28 works unstable at high AHB bus loading. If the bus loading is not high, the imx28 usb can work well at the most of time. There is a IC errata for this problem, usually, we consider IC errata is a problem not a new feature, and this workaround is needed for that, so we need to add them to stable tree 3.11+. Cc: robert.hodaszi@digi.com Signed-off-by: Peter Chen <peter.chen@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06USB: fix race between hub_disconnect and recursively_mark_NOTATTACHEDAlan Stern
commit 543d7784b07ffd16cc82a9cb4e1e0323fd0040f1 upstream. There is a race in the hub driver between hub_disconnect() and recursively_mark_NOTATTACHED(). This race can be triggered if the driver is unbound from a device at the same time as the bus's root hub is removed. When the race occurs, it can cause an oops: BUG: unable to handle kernel NULL pointer dereference at 0000015c IP: [<c16d5fb0>] recursively_mark_NOTATTACHED+0x20/0x60 Call Trace: [<c16d5fc4>] recursively_mark_NOTATTACHED+0x34/0x60 [<c16d5fc4>] recursively_mark_NOTATTACHED+0x34/0x60 [<c16d5fc4>] recursively_mark_NOTATTACHED+0x34/0x60 [<c16d5fc4>] recursively_mark_NOTATTACHED+0x34/0x60 [<c16d6082>] usb_set_device_state+0x92/0x120 [<c16d862b>] usb_disconnect+0x2b/0x1a0 [<c16dd4c0>] usb_remove_hcd+0xb0/0x160 [<c19ca846>] ? _raw_spin_unlock_irqrestore+0x26/0x50 [<c1704efc>] ehci_mid_remove+0x1c/0x30 [<c1704f26>] ehci_mid_stop_host+0x16/0x30 [<c16f7698>] penwell_otg_work+0xd28/0x3520 [<c19c945b>] ? __schedule+0x39b/0x7f0 [<c19cdb9d>] ? sub_preempt_count+0x3d/0x50 [<c125e97d>] process_one_work+0x11d/0x3d0 [<c19c7f4d>] ? mutex_unlock+0xd/0x10 [<c125e0e5>] ? manage_workers.isra.24+0x1b5/0x270 [<c125f009>] worker_thread+0xf9/0x320 [<c19ca846>] ? _raw_spin_unlock_irqrestore+0x26/0x50 [<c125ef10>] ? rescuer_thread+0x2b0/0x2b0 [<c1264ac4>] kthread+0x94/0xa0 [<c19d0f77>] ret_from_kernel_thread+0x1b/0x28 [<c1264a30>] ? kthread_create_on_node+0xc0/0xc0 One problem is that recursively_mark_NOTATTACHED() uses the intfdata value and hub->hdev->maxchild while hub_disconnect() is clearing them. Another problem is that it uses hub->ports[i] while the port device is being released. To fix this race, we need to hold the device_state_lock while hub_disconnect() changes the values. (Note that usb_disconnect() and hub_port_connect_change() already acquire this lock at similar critical times during a USB device's life cycle.) We also need to remove the port devices after maxchild has been set to 0, instead of before. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: "Du, Changbin" <changbinx.du@intel.com> Tested-by: "Du, Changbin" <changbinx.du@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: xhci: Check for XHCI_PLAT in xhci_cleanup_msix()Jack Pham
commit 9005355af23856c55a5538c9024355785424821b upstream. If CONFIG_PCI is enabled, make sure xhci_cleanup_msix() doesn't try to free a bogus PCI IRQ or dereference an invalid pci_dev when the xHCI device is actually a platform_device. This patch should be backported to kernels as old as 3.9, that contain the commit 52fb61250a7a132b0cfb9f4a1060a1f3c49e5a25 "xhci-plat: Don't enable legacy PCI interrupts." Signed-off-by: Jack Pham <jackp@codeaurora.org> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06USB: Nokia 502 is an unusual deviceMikhail Zolotaryov
commit 0e16114f2db4838251fb64f3b550996ad3585890 upstream. The USB storage operation of Nokia Asha 502 Dual SIM smartphone running Asha Platform 1.1.1 is unreliable in respect of data consistency (i.e. transfered files are corrupted). A similar issue is described here: http://discussions.nokia.com/t5/Asha-and-other-Nokia-Series-30/Nokia-301-USB-transfers-and-corrupted-files/td-p/1974170 The workaround is (MAX_SECTORS_64): rmmod usb_storage && modprobe usb_storage quirks=0421:06aa:m The patch adds the tested device to the unusual list permanently. Signed-off-by: Mikhail Zolotaryov <lebon@lebon.org.ua> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06USB: ftdi_sio: added CS5 quirk for broken smartcard readersColin Leitner
commit c1f15196ac3b541d084dc80a8fbd8a74c6a0bd44 upstream. Genuine FTDI chips support only CS7/8. A previous fix in commit 8704211f65a2 ("USB: ftdi_sio: fixed handling of unsupported CSIZE setting") enforced this limitation and reported it back to userspace. However, certain types of smartcard readers depend on specific driver behaviour that requests 0 data bits (not 5) to change into a different operating mode if CS5 has been set. This patch reenables this behaviour for all FTDI devices. Tagged to be added to stable, because it affects a lot of users of embedded systems which rely on these readers to work properly. Reported-by: Heinrich Siebmanns <H.Siebmanns@t-online.de> Tested-by: Heinrich Siebmanns <H.Siebmanns@t-online.de> Signed-off-by: Colin Leitner <colin.leitner@gmail.com> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06USB: cypress_m8: fix ring-indicator detection and reportingJohan Hovold
commit 440ebadeae9298d7de3d4d105342691841ec88d0 upstream. Fix ring-indicator (RI) status-bit definition, which was defined as CTS, effectively preventing RI-changes from being detected while reporting false RI status. This bug predates git. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06USB: serial: add support for iBall 3.5G connect usb modemRahul Bedarkar
commit 7d5c1b9c7cb5ec8e52b1adc65c484a923a8ea6c3 upstream. Add support for iBall 3.5G connect usb modem. $lsusb Bus 002 Device 006: ID 1c9e:9605 OMEGA TECHNOLOGY $usb-devices T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 6 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1c9e ProdID=9605 Rev=00.00 S: Manufacturer=USB Modem S: Product=USB Modem S: SerialNumber=1234567890ABCDEF C: #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage Signed-off-by: Rahul Bedarkar <rahulbedarkar89@gmail.com> Suggested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: option: add new zte 3g modem pids to option driver张君
commit 4d90b819ae4c7ea8fd5e2bb7edc68c0f334be2e4 upstream. Signed-off-by: Jun zhang <zhang.jun92@zte.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06USB: pl2303: fix data corruption on termios updatesJohan Hovold
commit 623c8263376c0b8a4b0c220232e7313d762cd0cc upstream. Some PL2303 devices are known to lose bytes if you change serial settings even to the same values as before. Avoid this by comparing the encoded settings with the previsouly used ones before configuring the device. The common case was fixed by commit bf5e5834bffc6 ("pl2303: Fix mode switching regression"), but this problem was still possible to trigger, for instance, by using the TCSETS2-interface to repeatedly request 115201 baud, which gets mapped to 115200 and thus always triggers a settings update. Cc: Frank Schäfer <fschaefer.oss@googlemail.com> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: chipidea: udc: using MultO at TD as real mult value for ISO-TXPeter Chen
commit 2fc5a7dace3c43e62402ab4e8800a8f1834ffe2a upstream. We have met a bug that the high bandwidth ISO-TX transfer has failed at the last packet if it is less than 1024, the TD status shows it is "Transaction Error". The root cause of this problem is: the mult value at qh is not correct for current TD's transfer length. We use TD list to queue un-transfer TDs, and change mult for new adding TDs. If new adding TDs transfer length less than 1024, but the queued un-transfer TDs transfer length is larger than 1024, the transfer error will occur, and vice versa. Usually, this problem occurs at the last packet, and the first packet for new frame. We fixed this problem by setting Mult at QH as the largest value (3), and set MultO (Multiplier Override) at TD according to every transfer length. It can cover both hardware version less than 2.3 (the real mult is MultO if it is not 0) and 2.3+ (the real mult is min(qh.mult, td.multo)). Since the MultO bits are only existed at TX TD, we keep the ISO-RX behavior unchanged. For stable tree: 3.11+. Cc: Michael Grzeschik <m.grzeschik@pengutronix.de> Reported-by: Matthieu Vanin <b47495@freescale.com> Tested-by: Matthieu Vanin <b47495@freescale.com> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: chipidea: need to mask INT_STATUS when write otgscPeter Chen
commit 5332ff1fb63c46588656e4208201bc131627c878 upstream. For otgsc, both enable bits and status bits are in it. So we need to make sure the status bits are not be cleared when write enable bits. It can fix one bug that we plug in/out Micro AB cable fast, and sometimes, the IDIS will be cleared wrongly when handle last ID interrupt (ID 0->1), so the current interrupt will not occur. For stable tree: 3.12+ Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: chipidea: imx: set CI_HDRC_IMX28_WRITE_FIX for imx28Peter Chen
commit 1071055e2a118a81c0b300d7f4af7eba3f7a7c82 upstream. Due to imx28 needs ARM swp instruction for writing, we set CI_HDRC_IMX28_WRITE_FIX for imx28. This patch is needed for stable tree 3.11+ Cc: robert.hodaszi@digi.com Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-06usb: chipidea: add freescale imx28 special write register methodPeter Chen
commit ed8f8318d2ef3e5f9e4ddf79349508c116b68d7f upstream. According to Freescale imx28 Errata, "ENGR119653 USB: ARM to USB register error issue", All USB register write operations must use the ARM SWP instruction. So, we implement special hw_write and hw_test_and_clear for imx28. Discussion for it at below: http://marc.info/?l=linux-usb&m=137996395529294&w=2 This patch is needed for stable tree 3.11+. Cc: robert.hodaszi@digi.com Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: musb: only cancel work if it is initializedSebastian Andrzej Siewior
commit 66fadea5b79c07154126bb0db375be915f611246 upstream. Since commit c5340bd14 ("usb: musb: cancel work on removal") the workqueue is cancelled but then if we bail out before the workqueue is setup we get this: |INFO: trying to register non-static key. |the code is fine but needs lockdep annotation. |turning off the locking correctness validator. |CPU: 0 PID: 708 Comm: modprobe Not tainted 3.12.0+ #435 |[<c00867bc>] (lock_acquire+0xf0/0x108) from [<c00529d0>] (flush_work+0x38/0x2ec) |[<c00529d0>] (flush_work+0x38/0x2ec) from [<c0052d24>] (__cancel_work_timer+0xa0/0x134) |[<c0052d24>] (__cancel_work_timer+0xa0/0x134) from [<bf0e4ae4>] (musb_free+0x40/0x60 [musb_hdrc]) |[<bf0e4ae4>] (musb_free+0x40/0x60 [musb_hdrc]) from [<bf0e5364>] (musb_probe+0x678/0xb78 [musb_hdrc]) |[<bf0e5364>] (musb_probe+0x678/0xb78 [musb_hdrc]) from [<c0294bf0>] (platform_drv_probe+0x1c/0x24) |[<c0294bf0>] (platform_drv_probe+0x1c/0x24) from [<c0293970>] (driver_probe_device+0x90/0x224) |[<c0293970>] (driver_probe_device+0x90/0x224) from [<c0291ef0>] (bus_for_each_drv+0x60/0x8c) |[<c0291ef0>] (bus_for_each_drv+0x60/0x8c) from [<c02938bc>] (device_attach+0x80/0xa4) |[<c02938bc>] (device_attach+0x80/0xa4) from [<c0292b24>] (bus_probe_device+0x88/0xac) |[<c0292b24>] (bus_probe_device+0x88/0xac) from [<c0291490>] (device_add+0x388/0x6c8) |[<c0291490>] (device_add+0x388/0x6c8) from [<c02952a0>] (platform_device_add+0x188/0x22c) |[<c02952a0>] (platform_device_add+0x188/0x22c) from [<bf11ea30>] (dsps_probe+0x294/0x394 [musb_dsps]) |[<bf11ea30>] (dsps_probe+0x294/0x394 [musb_dsps]) from [<c0294bf0>] (platform_drv_probe+0x1c/0x24) |platform musb-hdrc.1.auto: Driver musb-hdrc requests probe deferral |musb-hdrc musb-hdrc.1.auto: musb_init_controller failed with status -517 This patch moves the init part to earlier part so it can be cleaned as part of the fail3 label because now it is surrounded by the fail4 label. Step two is to remove it from musb_free() and add it to the two cleanup paths (error path and device removal) separately. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: musb: core: Call dma_controller_destroy() in error path only once.Sebastian Andrzej Siewior
commit 8d1aad7485e653c2c5fd985b326096f680f7d918 upstream. In commit f3ce4d5 ("usb: musb: core: call dma_controller_destroy() in the err path") I erroneously assumed that the dma controller is not removed in the error patch. This was wrong because it happens later via musb_free(). That means the original commit can be reverted because it is wrong or we do this, so it is more obvious. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: chipidea: fix nobody cared IRQ when booting with host rolePeter Chen
commit 5a1e1456fc633da5291285b1fff75d2a7507375b upstream. If we connect Male-A-To-Male-A cable between otg-host and host pc, the ci->vbus_active is set wrongly, and cause the controller run at peripheral mode when we load gadget module (ci_udc_start will be run), but the software runs at host mode due to id = 0. The ehci_irq can't handle suspend (USBi_SLI) interrupt which is enabled for peripheral mode, it causes no one will handle irq error. This patch is needed for 3.12 stable Acked-by: Michael Grzeschik <mgr@pengutronix.de> Reported-by: Marc Kleine-Budde <mkl@pengutronix.de> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: chipidea: host: Only disable the vbus regulator if it is not NULLFabio Estevam
commit cc5c9eb67f912cb2c349b04063ff9f444affbc59 upstream. Commit 40ed51a4b (usb: chipidea: host: add vbus regulator control) introduced a smatch complaint because regulator_disable() is called without checking whether ci->platdata->reg_vbus is not NULL. Fix this by adding the check. This patch is needed for 3.12 stable Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: cdc-wdm: manage_power should always set needs_remote_wakeupBjørn Mork
commit 4144bc861ed7934d56f16d2acd808d44af0fcc90 upstream. Reported-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Bjørn Mork <bjorn@mork.no> Acked-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09xhci: Limit the spurious wakeup fix only to HP machinesTakashi Iwai
commit 6962d914f317b119e0db7189199b21ec77a4b3e0 upstream. We've got regression reports that my previous fix for spurious wakeups after S5 on HP Haswell machines leads to the automatic reboot at shutdown on some machines. It turned out that the fix for one side triggers another BIOS bug in other side. So, it's exclusive. Since the original S5 wakeups have been confirmed only on HP machines, it'd be safer to apply it only to limited machines. As a wild guess, limiting to machines with HP PCI SSID should suffice. This patch should be backported to kernels as old as 3.12, that contain the commit 638298dc66ea36623dbc2757a24fc2c4ab41b016 "xhci: Fix spurious wakeups after S5 on Haswell". Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=66171 Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: <dashing.meng@gmail.com> Reported-by: Niklas Schnelle <niklas@komani.de> Reported-by: Giorgos <ganastasiouGR@gmail.com> Reported-by: <art1@vhex.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: serial: zte_ev: move support for ZTE AC2726 from zte_ev back to optionDmitry Kunilov
commit 52d0dc7597c89b2ab779f3dcb9b9bf0800dd9218 upstream. ZTE AC2726 EVDO modem drops ppp connection every minute when driven by zte_ev but works fine when driven by option. Move the support for AC2726 back to option driver. Signed-off-by: Dmitry Kunilov <dmitry.kunilov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09USB: serial: fix race in generic writeJohan Hovold
commit 6f6485463aada1ec6a0f3db6a03eb8e393d6bb55 upstream. Fix race in generic write implementation, which could lead to temporarily degraded throughput. The current generic write implementation introduced by commit 27c7acf22047 ("USB: serial: reimplement generic fifo-based writes") has always had this bug, although it's fairly hard to trigger and the consequences are not likely to be noticed. Specifically, a write() on one CPU while the completion handler is running on another could result in only one of the two write urbs being utilised to empty the remainder of the write fifo (unless there is a second write() that doesn't race during that time). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>