| Age | Commit message (Collapse) | Author |
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When doing a channel change, the pending URBs have to be killed
properly on calling htc_stop().
This fixes the probe response timeout seen when sending UDP traffic at
a high rate and running background scan at the same time.
Cc: stable <stable@kernel.org>
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The commit "ath9k_hw: warn if we cannot change the power to the chip"
introduced a new warning to indicate chip powerup failures, but this
is not required for devices that have been removed. Handle USB device
removal properly by checking for unplugged status.
For PCI devices, this warning will still be seen when the card is pulled
out, not sure how to check for card removal.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
Conflicts:
drivers/net/wireless/ath/ath9k/ath9k.h
drivers/net/wireless/ath/ath9k/main.c
drivers/net/wireless/ath/ath9k/xmit.c
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The HW has to be set to FULLSLEEP mode during suspend,
when no interface has been brought up. Not doing this would
break resume, as the chip won't be powered up at all.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Use the correct error condition exit in case firmware download
fails for some reason. Not doing so results in a panic:
usb 1-3: ath9k_htc: Transferred FW: ar9271.fw, size: 51280
usb 1-3: ath9k_htc: Firmware - ar9271.fw download failed
usb 1-3: ath9k_htc: Target is unresponsive
Failed to initialize the device
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
Pid: 2823, comm: insmod Tainted: G W 2.6.37-rc4-wl #11
Call Trace:
[<ffffffff81090d7e>] __lock_acquire+0xe3e/0x1d00
[<ffffffff813a9f14>] ? restore_args+0x0/0x30
[<ffffffff81058af1>] ? vprintk+0x321/0x500
[<ffffffff81092290>] lock_acquire+0xa0/0x190
[<ffffffffa02a0eac>] ? usb_kill_anchored_urbs+0x1c/0x80 [usbcore]
[<ffffffff813a8ea8>] _raw_spin_lock_irq+0x48/0x60
[<ffffffffa02a0eac>] ? usb_kill_anchored_urbs+0x1c/0x80 [usbcore]
[<ffffffff813a53fd>] ? printk+0x3c/0x3f
[<ffffffffa02a0eac>] usb_kill_anchored_urbs+0x1c/0x80 [usbcore]
[<ffffffffa0055388>] ath9k_hif_usb_dealloc_urbs+0x18/0x40 [ath9k_htc]
[<ffffffffa00557d7>] ath9k_hif_usb_probe+0x227/0x3d0 [ath9k_htc]
[<ffffffffa02a56ac>] usb_probe_interface+0x10c/0x210 [usbcore]
[<ffffffff812ae826>] driver_probe_device+0x96/0x1c0
[<ffffffff812ae9f3>] __driver_attach+0xa3/0xb0
[<ffffffff812ae950>] ? __driver_attach+0x0/0xb0
[<ffffffff812ad6ae>] bus_for_each_dev+0x5e/0x90
[<ffffffff812ae4c9>] driver_attach+0x19/0x20
[<ffffffff812ae038>] bus_add_driver+0x168/0x320
[<ffffffff812aec71>] driver_register+0x71/0x140
[<ffffffff811fc338>] ? __raw_spin_lock_init+0x38/0x70
[<ffffffffa02a438c>] usb_register_driver+0xdc/0x190 [usbcore]
[<ffffffffa0063000>] ? ath9k_htc_init+0x0/0x4f [ath9k_htc]
[<ffffffffa005599e>] ath9k_hif_usb_init+0x1e/0x20 [ath9k_htc]
[<ffffffffa006302b>] ath9k_htc_init+0x2b/0x4f [ath9k_htc]
[<ffffffff8100212f>] do_one_initcall+0x3f/0x180
[<ffffffff8109ef9b>] sys_init_module+0xbb/0x200
[<ffffffff8100bf52>] system_call_fastpath+0x16/0x1b
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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ath.ko is a common module shared between ath5k, ar9170usb, ath9k and ath9k_htc.
Adding driver specific data to the shared structure would impact all the
drivers. Handling USB device recognition for devices specific to ath9k_htc
can be handled within the driver itself.
Also, AR7010 refers to the processor used in both AR9280/AR9287 based
devices. Rename the device enumerations accordingly.
While at it, check properly for the bus type when choosing the EEPROM
base address for UB95.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Invert test and return early.
Move variable declarations to local scope.
Don't initialize variables to 0 unnecessarily.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Categorize AR7010 & AR9287 devices based on driver_info
of usb_device_id, instead of PIDs. This avoids per-device cases
and minimize code changes for new device addition.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Added driver_info to identify AR7010, R9287 HTC devices.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Treat new PIDs (0xA704, 0x1200) as AR7010 devices.
Cc: stable@kernel.org
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Added new VID/PIDs into supported devices list
Cc: stable@kernel.org
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Since the endpoint descriptors (EP3 & EP4) were changed from Interrupt
to Bulk type by firmware, the urb submission done on Bulk pipes.
And the recent commit "check the endpoint type against the pipe type"
added aditional error checking against pipe types under CONFIG_USB_DEBUG.
So bmAttribute has to be updated for both EP3 & EP4 before submitting
urbs on that pipe. This patch resolves the following failure.
[ 2215.710936] usb 1-1: usb_probe_device
[ 2215.710945] usb 1-1: configuration #1 chosen from 1 choice
[ 2215.711152] usb 1-1: adding 1-1:1.0 (config #1, interface 0)
[ 2215.711252] ath9k_hif_usb 1-1:1.0: usb_probe_interface
[ 2215.711255] ath9k_hif_usb 1-1:1.0: usb_probe_interface - got id
[ 2215.712780] usb 1-1: BOGUS urb xfer, pipe 3 != type 1
[ 2215.713782] usb 1-1: ath9k_htc: Unable to allocate URBs
[ 2215.713801] ath9k_hif_usb: probe of 1-1:1.0 failed with error -22
Reported-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch adds support for USB dongle with device ID 3346 from IMC Networks.
Signed-off-by: Haitao Zhang <minipanda@linuxrobot.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Netgear WNDA3200 device uses ar7010 firmware but it is failed to set
correct firmware offset on firmware download which causes device initialization
failure.
Cc: stable@kernel.org
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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To optimize register read/write operations, the HTC firmwares were patched
to change EP3 and EP4 pipe types from Interrupt to Bulk. So register writes
are submitted as bulk urbs, but register reads are not. Also changing the
register read endpoint pipe as bulk type when URBs are filled improves the
register reads considerably which results in reduced scan time and CPU
utilization.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The CPU consumption during the scan period is high, since
the register write go over Interrupt endpoint. On downloading
the firmware to the target, the USB descriptors are
'patched' to change the type of the endpoints from Interrupt
to Bulk.
With this fix, the CPU usage during a scan run comes down to
acceptable levels.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch handles the firmware loading properly
for device ID 7015.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
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Failure cases within ath9k_hif_usb_alloc_urbs are failed
to release allocated memory.
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch adds USB IDs for some more supported
devices.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Add the USB device IDs for AR7010 and handle
firmware loading properly.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Do not assign the FW name to driver_info but determine
it dynamically on device probe. This facilitates adding new
firmware.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Use kmemdup when some other buffer is immediately copied into the
allocated region.
A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression from,to,size,flag;
statement S;
@@
- to = \(kmalloc\|kzalloc\)(size,flag);
+ to = kmemdup(from,size,flag);
if (to==NULL || ...) S
- memcpy(to, from, size);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This is obviously a small picky thing. The original error handling code
doesn't free the most recent allocations which haven't been added to the
hif_dev->tx.tx_buf list yet.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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After c11d8f89d3b7: "ath9k_htc: Simplify TX URB management" we no longer
assume that tx_buf is a non-null pointer.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The HTC state has to be setup before initializing
the target because the ready message could possibly
come before the control endpoints in HTC have been
identified.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The URBs have to be allocated before uploading
the firmware to the target. This is needed to process
the target ready message properly.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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All commands to the target are disabled when the device
is unplugged, but a normal module unload has to be
differentiated from this case, as we could still receive
data in the RX endpoint. Fix this by checking if the
device is attached or not.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When handling the REGIN callback, processing
the incoming data first should be the preferred
mode of operation. Allocation of a new SKB may fail,
in which case, the URB will not be resubmitted.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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So, apparently there is a USB reboot command
that the target accepts. Using this instead of
usb_reset_device() fixes the issue of "descriptor read error"
that pops up on repeated load/unload.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch simplifies URB management for transmission,
by removing the 'FLUSH' variable (which is not needed,
since we can determine if the URB has been killed by
looking at the URB status), and also handling the STOP
case properly.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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usb device
This patch fixes two warnings below after unplugging ar9271 usb device:
-one is a kernel warning[1]
-another is a lockdep warning[2]
The root reason is that __skb_queue_purge can't be executed in hardirq
context, so the patch forks ath9k_skb_queue_purge(ath9k version of _skb_queue_purge),
which frees skb with dev_kfree_skb_any which can be run in hardirq
context safely, then prevent the lockdep warning and kernel warning after
unplugging ar9271 usb device.
[1] kernel warning
[ 602.894005] ------------[ cut here ]------------
[ 602.894005] WARNING: at net/core/skbuff.c:398 skb_release_head_state+0x71/0x87()
[ 602.894005] Hardware name: 6475EK2
[ 602.894005] Modules linked in: ath9k_htc ath9k ath9k_common ath9k_hw ath bridge stp llc sunrpc ipv6 cpufreq_ondemand acpi_cpufreq freq_table kvm_intel kvm arc4 ecb mac80211 snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep thinkpad_acpi snd_pcm snd_timer hwmon iTCO_wdt snd e1000e pcspkr i2c_i801 usbhid iTCO_vendor_support wmi cfg80211 yenta_socket rsrc_nonstatic pata_acpi snd_page_alloc soundcore uhci_hcd ohci_hcd ehci_hcd usbcore i915 drm_kms_helper drm i2c_algo_bit i2c_core video output [last unloaded: ath]
[ 602.894005] Pid: 2506, comm: ping Tainted: G W 2.6.34-rc3-wl #20
[ 602.894005] Call Trace:
[ 602.894005] <IRQ> [<ffffffff8104a41c>] warn_slowpath_common+0x7c/0x94
[ 602.894005] [<ffffffffa022f398>] ? __skb_queue_purge+0x43/0x4a [ath9k_htc]
[ 602.894005] [<ffffffff8104a448>] warn_slowpath_null+0x14/0x16
[ 602.894005] [<ffffffff813269c1>] skb_release_head_state+0x71/0x87
[ 602.894005] [<ffffffff8132829a>] __kfree_skb+0x16/0x81
[ 602.894005] [<ffffffff813283b2>] kfree_skb+0x7e/0x86
[ 602.894005] [<ffffffffa022f398>] __skb_queue_purge+0x43/0x4a [ath9k_htc]
[ 602.894005] [<ffffffffa022f560>] __hif_usb_tx+0x1c1/0x21b [ath9k_htc]
[ 602.894005] [<ffffffffa022f73c>] hif_usb_tx_cb+0x12f/0x154 [ath9k_htc]
[ 602.894005] [<ffffffffa00d2fbe>] usb_hcd_giveback_urb+0x91/0xc5 [usbcore]
[ 602.894005] [<ffffffffa00f6c34>] ehci_urb_done+0x7a/0x8b [ehci_hcd]
[ 602.894005] [<ffffffffa00f6f33>] qh_completions+0x2ee/0x376 [ehci_hcd]
[ 602.894005] [<ffffffffa00f8ba5>] ehci_work+0x95/0x76e [ehci_hcd]
[ 602.894005] [<ffffffffa00fa5ae>] ? ehci_irq+0x2f/0x1d4 [ehci_hcd]
[ 602.894005] [<ffffffffa00fa725>] ehci_irq+0x1a6/0x1d4 [ehci_hcd]
[ 602.894005] [<ffffffff810a6d18>] ? __rcu_process_callbacks+0x7a/0x2df
[ 602.894005] [<ffffffff810a47a4>] ? handle_fasteoi_irq+0x22/0xd2
[ 602.894005] [<ffffffffa00d268d>] usb_hcd_irq+0x4a/0xa7 [usbcore]
[ 602.894005] [<ffffffff810a2853>] handle_IRQ_event+0x77/0x14f
[ 602.894005] [<ffffffff813285ce>] ? skb_release_data+0xc9/0xce
[ 602.894005] [<ffffffff810a4814>] handle_fasteoi_irq+0x92/0xd2
[ 602.894005] [<ffffffff8100c4fb>] handle_irq+0x88/0x91
[ 602.894005] [<ffffffff8100baed>] do_IRQ+0x63/0xc9
[ 602.894005] [<ffffffff81354245>] ? ip_flush_pending_frames+0x4d/0x5c
[ 602.894005] [<ffffffff813ba993>] ret_from_intr+0x0/0x16
[ 602.894005] <EOI> [<ffffffff811095fe>] ? __delete_object+0x5a/0xb1
[ 602.894005] [<ffffffff813ba5f5>] ? _raw_write_unlock_irqrestore+0x47/0x7e
[ 602.894005] [<ffffffff813ba5fa>] ? _raw_write_unlock_irqrestore+0x4c/0x7e
[ 602.894005] [<ffffffff811095fe>] __delete_object+0x5a/0xb1
[ 602.894005] [<ffffffff81109814>] delete_object_full+0x25/0x31
[ 602.894005] [<ffffffff813a60c0>] kmemleak_free+0x26/0x45
[ 602.894005] [<ffffffff810ff517>] kfree+0xaa/0x149
[ 602.894005] [<ffffffff81323fb7>] ? sock_def_write_space+0x84/0x89
[ 602.894005] [<ffffffff81354245>] ? ip_flush_pending_frames+0x4d/0x5c
[ 602.894005] [<ffffffff813285ce>] skb_release_data+0xc9/0xce
[ 602.894005] [<ffffffff813282a2>] __kfree_skb+0x1e/0x81
[ 602.894005] [<ffffffff813283b2>] kfree_skb+0x7e/0x86
[ 602.894005] [<ffffffff81354245>] ip_flush_pending_frames+0x4d/0x5c
[ 602.894005] [<ffffffff81370c1f>] raw_sendmsg+0x653/0x709
[ 602.894005] [<ffffffff81379e31>] inet_sendmsg+0x54/0x5d
[ 602.894005] [<ffffffff813207a2>] ? sock_recvmsg+0xc6/0xdf
[ 602.894005] [<ffffffff813208c1>] sock_sendmsg+0xc0/0xd9
[ 602.894005] [<ffffffff810e13b4>] ? might_fault+0x68/0xb8
[ 602.894005] [<ffffffff810e13fd>] ? might_fault+0xb1/0xb8
[ 602.894005] [<ffffffff8132a1c3>] ? copy_from_user+0x2f/0x31
[ 602.894005] [<ffffffff8132a5b3>] ? verify_iovec+0x54/0x91
[ 602.894005] [<ffffffff81320d41>] sys_sendmsg+0x1da/0x241
[ 602.894005] [<ffffffff8103d327>] ? finish_task_switch+0x0/0xc9
[ 602.894005] [<ffffffff8103d327>] ? finish_task_switch+0x0/0xc9
[ 602.894005] [<ffffffff8107642e>] ? trace_hardirqs_on_caller+0x16/0x150
[ 602.894005] [<ffffffff813ba27d>] ? _raw_spin_unlock_irq+0x56/0x63
[ 602.894005] [<ffffffff8103d3cb>] ? finish_task_switch+0xa4/0xc9
[ 602.894005] [<ffffffff8103d327>] ? finish_task_switch+0x0/0xc9
[ 602.894005] [<ffffffff810357fe>] ? need_resched+0x23/0x2d
[ 602.894005] [<ffffffff8107642e>] ? trace_hardirqs_on_caller+0x16/0x150
[ 602.894005] [<ffffffff813b9750>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[ 602.894005] [<ffffffff81009c02>] system_call_fastpath+0x16/0x1b
[ 602.894005] ---[ end trace 91ba2d8dc7826839 ]---
[2] lockdep warning
[ 169.363215] ======================================================
[ 169.365390] [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
[ 169.366334] 2.6.34-rc3-wl #20
[ 169.366872] ------------------------------------------------------
[ 169.366872] khubd/78 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
[ 169.366872] (clock-AF_INET){++.?..}, at: [<ffffffff81323f51>] sock_def_write_space+0x1e/0x89
[ 169.366872]
[ 169.366872] and this task is already holding:
[ 169.366872] (&(&hif_dev->tx.tx_lock)->rlock){-.-...}, at: [<ffffffffa03715b0>] hif_usb_stop+0x24/0x53 [ath9k_htc]
[ 169.366872] which would create a new lock dependency:
[ 169.366872] (&(&hif_dev->tx.tx_lock)->rlock){-.-...} -> (clock-AF_INET){++.?..}
[ 169.366872]
[ 169.366872] but this new dependency connects a HARDIRQ-irq-safe lock:
[ 169.366872] (&(&hif_dev->tx.tx_lock)->rlock){-.-...}
[ 169.366872] ... which became HARDIRQ-irq-safe at:
[ 169.366872] [<ffffffff810772d5>] __lock_acquire+0x2c6/0xd2b
[ 169.366872] [<ffffffff8107866d>] lock_acquire+0xec/0x119
[ 169.366872] [<ffffffff813b99bb>] _raw_spin_lock+0x40/0x73
[ 169.366872] [<ffffffffa037163d>] hif_usb_tx_cb+0x5e/0x154 [ath9k_htc]
[ 169.366872] [<ffffffffa00d2fbe>] usb_hcd_giveback_urb+0x91/0xc5 [usbcore]
[ 169.366872] [<ffffffffa00f6c34>] ehci_urb_done+0x7a/0x8b [ehci_hcd]
[ 169.366872] [<ffffffffa00f6f33>] qh_completions+0x2ee/0x376 [ehci_hcd]
[ 169.366872] [<ffffffffa00f8ba5>] ehci_work+0x95/0x76e [ehci_hcd]
[ 169.366872] [<ffffffffa00fa725>] ehci_irq+0x1a6/0x1d4 [ehci_hcd]
[ 169.366872] [<ffffffffa00d268d>] usb_hcd_irq+0x4a/0xa7 [usbcore]
[ 169.366872] [<ffffffff810a2853>] handle_IRQ_event+0x77/0x14f
[ 169.366872] [<ffffffff810a4814>] handle_fasteoi_irq+0x92/0xd2
[ 169.366872] [<ffffffff8100c4fb>] handle_irq+0x88/0x91
[ 169.366872] [<ffffffff8100baed>] do_IRQ+0x63/0xc9
[ 169.366872] [<ffffffff813ba993>] ret_from_intr+0x0/0x16
[ 169.366872] [<ffffffff8130f6ee>] cpuidle_idle_call+0xa7/0x115
[ 169.366872] [<ffffffff81008c4f>] cpu_idle+0x68/0xc4
[ 169.366872] [<ffffffff813a41e0>] rest_init+0x104/0x10b
[ 169.366872] [<ffffffff81899db3>] start_kernel+0x3f1/0x3fc
[ 169.366872] [<ffffffff818992c8>] x86_64_start_reservations+0xb3/0xb7
[ 169.366872] [<ffffffff818993c4>] x86_64_start_kernel+0xf8/0x107
[ 169.366872]
[ 169.366872] to a HARDIRQ-irq-unsafe lock:
[ 169.366872] (clock-AF_INET){++.?..}
[ 169.366872] ... which became HARDIRQ-irq-unsafe at:
[ 169.366872] ... [<ffffffff81077349>] __lock_acquire+0x33a/0xd2b
[ 169.366872] [<ffffffff8107866d>] lock_acquire+0xec/0x119
[ 169.366872] [<ffffffff813b9d07>] _raw_write_lock_bh+0x45/0x7a
[ 169.366872] [<ffffffff8135cf14>] tcp_close+0x165/0x34d
[ 169.366872] [<ffffffff8137aced>] inet_release+0x55/0x5c
[ 169.366872] [<ffffffff81321350>] sock_release+0x1f/0x6e
[ 169.366872] [<ffffffff813213c6>] sock_close+0x27/0x2b
[ 169.366872] [<ffffffff8110dd45>] __fput+0x125/0x1ca
[ 169.366872] [<ffffffff8110de04>] fput+0x1a/0x1c
[ 169.366872] [<ffffffff8110adc9>] filp_close+0x68/0x72
[ 169.366872] [<ffffffff8110ae80>] sys_close+0xad/0xe7
[ 169.366872] [<ffffffff81009c02>] system_call_fastpath+0x16/0x1b
(Trimmed at the "other info that might help us debug this" line in
the interest of brevity... -- JWL)
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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In ath9k-htc register out path, ath9k-htc will pass skb->data into
usb hcd and usb hcd will do dma mapping and unmapping to the buffer
pointed by skb->data, so we should pass a cache-line aligned address.
This patch replace __dev_alloc_skb with alloc_skb to make skb->data
pointed to a cacheline aligned address simply since ath9k-htc does not
skb_push on the skb and pass it to mac80211, also use kfree_skb to free
the skb allocated by alloc_skb(we can use kfree_skb safely in hardirq
context since skb->destructor is NULL always in the path).
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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In ath9k-htc register in path, ath9k-htc will pass skb->data into
usb hcd and usb hcd will do dma mapping and unmapping to the buffer
pointed by skb->data, so we should pass a cache-line aligned address.
This patch replace __dev_alloc_skb with alloc_skb to make skb->data
pointed to a cacheline aligned address simply since ath9k-htc does not
skb_push on the skb and pass it to mac80211, also use kfree_skb to free
the skb allocated by alloc_skb(we can use kfree_skb safely in hardirq
context since skb->destructor is NULL always in the path).
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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In ath9k_hif_usb_alloc_rx_urbs, ath9k-htc will pass skb->data into
usb hcd and usb hcd will do dma mapping and unmapping to the buffer
pointed by skb->data, so we should pass a cache-line aligned address.
This patch replace __dev_alloc_skb with alloc_skb to make skb->data
pointed to a cacheline aligned address simply since ath9k-htc does not
skb_push on the skb and pass it to mac80211, also use kfree_skb to free
the skbs allocated by alloc_skb(we can use kfree_skb safely in hardirq
context since skb->destructor is NULL always in the path).
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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hif_usb_regout_cb() frees the given URB, which is
borked by design. Use an anchor to simplify URB
management.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The maximum number of packets in a single buffer in
stream mode is 10. The driver currently uses 8 - which
caused stack corruption, in the absence of any kind
of OOB checking.
Fixing this to the correct value of 10 fixes the module
unload issue.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Tested-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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RX URBs are automatically freed when the reference
count drops to zero - this currently doesn't happen when
usb_kill_anchored_urbs() is called during unload.
Fix this by dropping the reference count by one during
initial submission.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Use a spin lock to prevent concurrent access
to variables dealing with RX stream mode handling.
Currently, no protection is implemented - which
causes problems in RX.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This patch introduces the usage of URB anchors,
thus reducing a large amount of code dealing with
URB maintenance within the driver. The RX callback now
takes care of freeing the SKB associated with each URB.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Features:
* Station mode
* IBSS mode
* Monitor mode
* Legacy support
* HT support
* TX/RX 11n Aggregation
* HW encryption
* LED
* Suspend/Resume
For more information: http://wireless.kernel.org/en/users/Drivers/ath9k_htc
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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