ENGR00307017: input: keyboard: snvs_pwrkey: fix system crash sometimes during boot

If there is one ONOFF power key interrupt pending before RESET key pushed. system will
crash as below in the next boot cycle, because the pending interrupt will be serviced
after devm_request_irq while the driver probe has not finished and the drvdata is NULL.
So clear the meaningless irq status in the probe.

ousedev: PS/2 mouse device common for all mice
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = 80004000
[00000000] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.17-01631-g6b7b681-dirty #343
task: a806c000 ti: a806e000 task.ti: a806e000
PC is at imx_snvs_pwrkey_interrupt+0x10/0x4c
LR is at imx_snvs_pwrkey_interrupt+0xc/0x4c
pc : [<803f0594>]    lr : [<803f0590>]    psr: a0000193
sp : a806fd10  ip : fffffffa  fp : 00000001
r10: 80cb630e  r9 : a8006b40  r8 : 00000024
r7 : 00000000  r6 : 00000000  r5 : a8006b90  r4 : a83b5340
r3 : 803f0584  r2 : a806fd48  r1 : a80ad000  r0 : 00000000
Flags: NzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c53c7d  Table: 8000404a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xa806e238)
Stack: (0xa806fd10 to 0xa8070000)
fd00:                                     a83b5340 a8006b90 00000000 8007363c
fd20: 80cb6000 80090604 00000001 a8006b40 a8006b90 a83b5340 c0802100 60000113
fd40: a8006b70 00000000 00000000 800737a0 a8006b40 a8006b90 00000000 8007646c
fd60: 800763e8 00000024 00000024 80072e04 80c5fef0 8000e948 c080210c 80c6a904
fd80: a806fda0 80008558 80074b94 8063c75c 60000113 ffffffff a806fdd4 8000dc80
fda0: a8006b90 60000113 a806fdb8 00000007 a8006b40 a83b5340 a8006b90 00000024
fdc0: 60000113 a8006b70 00000000 00000000 000000ff a806fde8 80074b94 8063c75c
fde0: 60000113 ffffffff 00000000 80074b94 80c6f688 020cc000 00000000 00000001
fe00: a83b5340 a8006b40 803f0584 00000004 00000024 a80ad000 00000000 80074f50
fe20: a83b5310 a80ad000 00000024 803f0584 00000000 a80ad010 80c53804 80076a40
fe40: a80ab880 a80ad000 a836e990 a836e990 a80ad010 8152696c a80ad000 80cb6480
fe60: 80c44f90 803f0774 00000004 a80ab880 a80ad000 00000000 80d0ba0c a80ad010
fe80: 00000000 80c9a1f0 80cb6480 803099c0 803099a8 8030876c 00000000 a80ad010
fea0: 80c9a1f0 a80ad044 00000000 80308958 00000000 80c9a1f0 803088cc 80306c88
fec0: a804055c a80ac1b4 80c9a1f0 a836e680 80c89a30 80307f30 80b82af4 80c9a1f0
fee0: 00000006 80c9a1f0 00000006 80cb6480 80cb6480 80308f34 80c5e688 00000006
ff00: 80cb6480 80cb6480 80cb6480 80008704 000000f2 80041d60 80c537dc a806e010
ff20: 80b81e6c 80be5e54 00000006 00000006 800415cc 80041624 00000000 80c5e688
ff40: 00000006 80cb6480 80cb6480 80c194dc 000000f2 80c53804 80c537f8 80c19be0
ff60: 00000006 00000006 80c194dc 900ff07c ab86ff79 08012008 a806ff9c 00000000
ff80: 80631050 00000000 00000000 00000000 00000000 00000000 00000000 80631058
ffa0: 00000000 00000000 80631050 8000e118 00000000 00000000 00000000 00000000
ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
ffe0: 00000000 00000000 00000000 00000000 00000013 00000000 fdfe5bba dbfe26ba
[<803f0594>] (imx_snvs_pwrkey_interrupt+0x10/0x4c) from [<8007363c>] (handle_irq_event_percpu+0x54/0x17c)
[<8007363c>] (handle_irq_event_percpu+0x54/0x17c) from [<800737a0>] (handle_irq_event+0x3c/0x5c)
[<800737a0>] (handle_irq_event+0x3c/0x5c) from [<8007646c>] (handle_fasteoi_irq+0x84/0x14c)
[<8007646c>] (handle_fasteoi_irq+0x84/0x14c) from [<80072e04>] (generic_handle_irq+0x2c/0x3c)
[<80072e04>] (generic_handle_irq+0x2c/0x3c) from [<8000e948>] (handle_IRQ+0x40/0x90)
[<8000e948>] (handle_IRQ+0x40/0x90) from [<80008558>] (gic_handle_irq+0x2c/0x5c)
[<80008558>] (gic_handle_irq+0x2c/0x5c) from [<8000dc80>] (__irq_svc+0x40/0x70)
Exception stack(0xa806fda0 to 0xa806fde8)
fda0: a8006b90 60000113 a806fdb8 00000007 a8006b40 a83b5340 a8006b90 00000024
fdc0: 60000113 a8006b70 00000000 00000000 000000ff a806fde8 80074b94 8063c75c
fde0: 60000113 ffffffff
[<8000dc80>] (__irq_svc+0x40/0x70) from [<8063c75c>] (_raw_spin_unlock_irqrestore+0x20/0x48)
[<8063c75c>] (_raw_spin_unlock_irqrestore+0x20/0x48) from [<80074b94>] (__setup_irq+0x1b4/0x440)
[<80074b94>] (__setup_irq+0x1b4/0x440) from [<80074f50>] (request_threaded_irq+0xa8/0x128)
[<80074f50>] (request_threaded_irq+0xa8/0x128) from [<80076a40>] (devm_request_threaded_irq+0x58/0x9c)
[<80076a40>] (devm_request_threaded_irq+0x58/0x9c) from [<803f0774>] (imx_snvs_pwrkey_probe+0x118/0x250)
[<803f0774>] (imx_snvs_pwrkey_probe+0x118/0x250) from [<803099c0>] (platform_drv_probe+0x18/0x1c)
[<803099c0>] (platform_drv_probe+0x18/0x1c) from [<8030876c>] (driver_probe_device+0x10c/0x228)
[<8030876c>] (driver_probe_device+0x10c/0x228) from [<80308958>] (__driver_attach+0x8c/0x90)
[<80308958>] (__driver_attach+0x8c/0x90) from [<80306c88>] (bus_for_each_dev+0x60/0x94)
[<80306c88>] (bus_for_each_dev+0x60/0x94) from [<80307f30>] (bus_add_driver+0x1c0/0x24c)
[<80307f30>] (bus_add_driver+0x1c0/0x24c) from [<80308f34>] (driver_register+0x78/0x140)
[<80308f34>] (driver_register+0x78/0x140) from [<80008704>] (do_one_initcall+0x108/0x158)
[<80008704>] (do_one_initcall+0x108/0x158) from [<80c19be0>] (kernel_init_freeable+0x138/0x1d8)
[<80c19be0>] (kernel_init_freeable+0x138/0x1d8) from [<80631058>] (kernel_init+0x8/0x158)
[<80631058>] (kernel_init+0x8/0x158) from [<8000e118>] (ret_from_fork+0x14/0x3c)
Code: e92d4070 e2810010 ebfc5ebe e1a06000 (e5904000)
---[ end trace bd5e3234432334c1 ]---
Kernel panic - not syncing: Fatal exception in interrupt

Signed-off-by: Robin Gong <b38343@freescale.com>

0 files changed, 0 insertions, 0 deletions