diff options
| author | Anatolij Gustschin <agust@denx.de> | 2012-04-10 08:48:11 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 21:13:52 (GMT) |
| commit | f941f6922533316556d4dc6eee9c19d4a832c560 (patch) | |
| tree | 77afd7903f3135619cd274a649c789bc4286ff26 /drivers/usb | |
| parent | 5bd7b419ef2eb4989b207753e088c3437159618a (diff) | |
| download | linux-f941f6922533316556d4dc6eee9c19d4a832c560.tar.xz | |
USB: ehci-fsl: Fix kernel crash on mpc5121e
Since commit 28c56ea1431421dec51b7b229369e991481453df
(powerpc/usb: fix bug of kernel hang when initializing usb)
the kernel crashes on mpc5121e. mpc5121e doesn't have system interface
registers, accessing this register address space cause the machine check
exception and a kernel crash:
...
[ 1.294596] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.316491] fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
[ 1.337334] fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
[ 1.358548] Machine check in kernel mode.
[ 1.375917] Caused by (from SRR1=49030): Transfer error ack signal
[ 1.395505] Oops: Machine check, sig: 7 [#1]
[ 1.413113] MPC5121 ADS
[ 1.428718] Modules linked in:
[ 1.444841] NIP: c026efc4 LR: c0278b50 CTR: 00000000
[ 1.463342] REGS: df837ba0 TRAP: 0200 Not tainted (3.3.0-08839-gb5174fa)
[ 1.484083] MSR: 00049030 <EE,ME,IR,DR> CR: 42042022 XER: 20000000
[ 1.504099] TASK = df834000[1] 'swapper' THREAD: df836000
[ 1.509667] GPR00: 1c000000 df837c50 df834000 df9d74e0 00000003 00000010 00000000 00000000
[ 1.531650] GPR08: 00000020 00000000 c037cdd8 e1088000 22042028 1001a69c 00000000 00000000
[ 1.553762] GPR16: 1ffbce70 00000000 1fef5b28 1fef3e08 00000000 00000000 1ffcbc7c c045b264
[ 1.575824] GPR24: 0000008b 00000002 c04a7dd0 e1088000 df33c960 df9d74e0 00000000 df9d7400
[ 1.612295] NIP [c026efc4] ehci_fsl_setup_phy+0x110/0x124
[ 1.632454] LR [c0278b50] ehci_fsl_setup+0x29c/0x304
[ 1.652065] Call Trace:
[ 1.668923] [df837c50] [c0278a40] ehci_fsl_setup+0x18c/0x304 (unreliable)
[ 1.690332] [df837c70] [c025cba4] usb_add_hcd+0x1f0/0x66c
[ 1.710377] [df837cb0] [c0277ab8] ehci_fsl_drv_probe+0x180/0x308
[ 1.731322] [df837ce0] [c01fc7a8] platform_drv_probe+0x20/0x30
[ 1.752202] [df837cf0] [c01fb0ac] driver_probe_device+0x8c/0x214
[ 1.773491] [df837d10] [c01f956c] bus_for_each_drv+0x6c/0xa8
[ 1.794279] [df837d40] [c01fafdc] device_attach+0xb4/0xd8
[ 1.814574] [df837d60] [c01fa44c] bus_probe_device+0xa4/0xb4
[ 1.835343] [df837d80] [c01f87a8] device_add+0x52c/0x5dc
[ 1.855462] [df837dd0] [c01fcd58] platform_device_add+0x124/0x1d0
[ 1.876558] [df837df0] [c036dcec] fsl_usb2_device_register+0xa0/0xd4
[ 1.897512] [df837e10] [c036df28] fsl_usb2_mph_dr_of_probe+0x208/0x264
[ 1.918253] [df837e90] [c01fc7a8] platform_drv_probe+0x20/0x30
[ 1.938300] [df837ea0] [c01fb0ac] driver_probe_device+0x8c/0x214
[ 1.958511] [df837ec0] [c01fb2f0] __driver_attach+0xbc/0xc0
[ 1.978088] [df837ee0] [c01f9608] bus_for_each_dev+0x60/0x9c
[ 1.997589] [df837f10] [c01fab88] driver_attach+0x24/0x34
[ 2.016757] [df837f20] [c01fa744] bus_add_driver+0x1ac/0x274
[ 2.036339] [df837f50] [c01fb898] driver_register+0x88/0x150
[ 2.056052] [df837f70] [c01fcabc] platform_driver_register+0x68/0x78
[ 2.076650] [df837f80] [c0446500] fsl_usb2_mph_dr_driver_init+0x18/0x28
[ 2.097734] [df837f90] [c0003988] do_one_initcall+0x148/0x1b0
[ 2.117934] [df837fc0] [c042d89c] kernel_init+0xfc/0x190
[ 2.137667] [df837ff0] [c000d2c4] kernel_thread+0x4c/0x68
[ 2.157240] Instruction dump:
[ 2.174119] 90050004 4e800020 2f840003 419e0014 2f840004 409eff64 6400c000 4bffff5c
[ 2.196000] 64001000 7c0004ac 812b0500 0c090000 <4c00012c> 61290200 7c0004ac 912b0500
[ 2.218100] ---[ end trace 21659aedb84ad816 ]---
[ 2.237089]
[ 3.232940] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000007
[ 3.232954]
[ 3.271575] Rebooting in 1 seconds..
Check pdata->have_sysif_regs flag before accessing system interface
registers.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-fsl.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 3e73451..d0a84bd 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -218,6 +218,9 @@ static void ehci_fsl_setup_phy(struct ehci_hcd *ehci, u32 portsc; struct usb_hcd *hcd = ehci_to_hcd(ehci); void __iomem *non_ehci = hcd->regs; + struct fsl_usb2_platform_data *pdata; + + pdata = hcd->self.controller->platform_data; portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]); portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW); @@ -234,7 +237,9 @@ static void ehci_fsl_setup_phy(struct ehci_hcd *ehci, /* fall through */ case FSL_USB2_PHY_UTMI: /* enable UTMI PHY */ - setbits32(non_ehci + FSL_SOC_USB_CTRL, CTRL_UTMI_PHY_EN); + if (pdata->have_sysif_regs) + setbits32(non_ehci + FSL_SOC_USB_CTRL, + CTRL_UTMI_PHY_EN); portsc |= PORT_PTS_UTMI; break; case FSL_USB2_PHY_NONE: |