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Date: Wed, 11 Feb 2015 23:54:28 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Sonic Zhang <sonic.adi@...il.com>
Cc: Sonic Zhang <sonic.zhang@...log.com>, linux-input@...r.kernel.org,
Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFT/PATCH] Input: bfin_rotary - introduce open and close methods
Hi Sonic,
On Fri, Feb 06, 2015 at 05:37:29PM +0800, Sonic Zhang wrote:
> Hi Dmitry,
>
> After apply your patch manually to my blackfin kernel tree, I got
> kernel panic when probe the rotary.
Hmm, I found one potential issue that might cause panic, but it was
preexisting.... Anyway, I uploaded all bfin_rotary patches on top of
3.19 into bfin_rotary branch of my tree on kernel.org, can you please
grab them from there and try again?
Thanks!
>
> NULL pointer access
> Kernel OOPS in progress
> Deferred Exception context
> CURRENT PROCESS:
> COMM=swapper PID=1 CPU=0
> invalid mm
> return address: [0x00167648]; contents of:
> 0x00167620: f000 b068 0a08 1807 3038 3007 e801 0000
> 0x00167630: 05b3 0010 3044 6001 e3fc da5a b0a8 0c80
> 0x00167640: 191b 0000 6802 6000 [e511] 0075 ac4a 9710
> 0x00167650: ac4a 6c22 9710 a3a2 a0a9 0c02 18ec cc00
>
> CPU: 0 PID: 1 Comm: swapper Not tainted
> 3.17.0-ADI-2014R1-pre-00455-ga5d060e-dirty #5
> task: 04025a20 ti: 04026000 task.ti: 04026000
> Compiled for cpu family 0x27fe (Rev 0), but running on:0x0000 (Rev 0)
> ADSP-BF609-0.0 500(MHz CCLK) 125(MHz SCLK) (mpu off)
> Linux version 3.17.0-ADI-2014R1-pre-00455-ga5d060e-dirty (sonic@...e)
> (gcc version 4.3.5 (ADI-mast5
>
> SEQUENCER STATUS: Not tainted
> SEQSTAT: 00000027 IPEND: 8008 IMASK: ffff SYSCFG: 2806
> EXCAUSE : 0x27
> physical IVG3 asserted : <0xffa00744> { _trap + 0x0 }
> physical IVG15 asserted : <0xffa00d68> { _evt_system_call + 0x0 }
> logical irq 6 mapped : <0xffa003bc> { _bfin_coretmr_interrupt + 0x0 }
> logical irq 7 mapped : <0x00008858> { _bfin_fault_routine + 0x0 }
> logical irq 11 mapped : <0x00007754> { _l2_ecc_err + 0x0 }
> logical irq 13 mapped : <0x00008858> { _bfin_fault_routine + 0x0 }
> logical irq 39 mapped : <0x0016a350> { _bfin_twi_interrupt_entry + 0x0 }
> logical irq 40 mapped : <0x0016a350> { _bfin_twi_interrupt_entry + 0x0 }
> logical irq 62 mapped : <0x00132438> { _adi_spi_tx_dma_isr + 0x0 }
> logical irq 63 mapped : <0x00132784> { _adi_spi_rx_dma_isr + 0x0 }
> logical irq 64 mapped : <0x0013282c> { _spi_irq_err + 0x0 }
> logical irq 65 mapped : <0x00132438> { _adi_spi_tx_dma_isr + 0x0 }
> logical irq 66 mapped : <0x00132784> { _adi_spi_rx_dma_isr + 0x0 }
> logical irq 67 mapped : <0x0013282c> { _spi_irq_err + 0x0 }
> RETE: <0x00000000> /* Maybe null pointer? */
> RETN: <0x04027cf4> /* kernel dynamic memory (maybe user-space) */
> RETX: <0x00000480> /* Maybe fixed code section */
> RETS: <0x0016763c> { _bfin_rotary_probe + 0x54 }
> PC : <0x00167648> { _bfin_rotary_probe + 0x60 }
> DCPLB_FAULT_ADDR: <0x000001d4> /* Maybe null pointer? */
> ICPLB_FAULT_ADDR: <0x00167648> { _bfin_rotary_probe + 0x60 }
> PROCESSOR STATE:
> R0 : 00000000 R1 : 00000000 R2 : 00000400 R3 : 00000001
> R4 : 0030c310 R5 : 002d6680 R6 : 002e7bd8 R7 : 00000000
> P0 : 00000002 P1 : 002e86ac P2 : 00000000 P3 : 002e8690
> P4 : 002e7bcc P5 : 0409930c FP : 04027d10 SP : 04027c18
> LB0: ffa015b8 LT0: ffa015b8 LC0: 00000000
> LB1: 00094072 LT1: 00094062 LC1: 00000000
> B0 : 0000001f L0 : 00000000 M0 : 0402a400 I0 : 04027c44
> B1 : 0000000e L1 : 00000000 M1 : 002fa814 I1 : 0407846c
> B2 : 00000020 L2 : 00000000 M2 : 00000000 I2 : 04028ac8
> B3 : 0022aa6c L3 : 00000000 M3 : 00000000 I3 : 0000001a
> A0.w: 00000000 A0.x: 00000000 A1.w: 00000000 A1.x: 00000000
> USP : 00000000 ASTAT: 02003004
>
> Hardware Trace:
> 0 Target : <0x00003fe8> { _trap_c + 0x0 }
> Source : <0xffa006d8> { _exception_to_level5 + 0xa0 } JUMP.L
> 1 Target : <0xffa00638> { _exception_to_level5 + 0x0 }
> Source : <0xffa004f2> { _bfin_return_from_exception + 0x6 } RTX
> 2 Target : <0xffa004ec> { _bfin_return_from_exception + 0x0 }
> Source : <0xffa00590> { _ex_trap_c + 0x70 } JUMP.S
> 3 Target : <0xffa00520> { _ex_trap_c + 0x0 }
> Source : <0xffa0076e> { _trap + 0x2a } JUMP (P4)
> 4 Target : <0xffa00744> { _trap + 0x0 }
> FAULT : <0x00167648> { _bfin_rotary_probe + 0x60 } P1 = [P2 + -0x54]
> Source : <0x00167646> { _bfin_rotary_probe + 0x5e } 0x6000
> 5 Target : <0x0016763c> { _bfin_rotary_probe + 0x54 }
> Source : <0x00102b50> { _platform_get_irq + 0x64 } RTS
> 6 Target : <0x00102b44> { _platform_get_irq + 0x58 }
> Source : <0x00102b2c> { _platform_get_irq + 0x40 } IF CC JUMP pcrel
> 7 Target : <0x00102b0a> { _platform_get_irq + 0x1e }
> Source : <0x00102b28> { _platform_get_irq + 0x3c } IF !CC JUMP pcrel (BP)
> 8 Target : <0x00102b14> { _platform_get_irq + 0x28 }
> Source : <0x00102b08> { _platform_get_irq + 0x1c } JUMP.S
> 9 Target : <0x00102aec> { _platform_get_irq + 0x0 }
> Source : <0x00167638> { _bfin_rotary_probe + 0x50 } JUMP.L
> 10 Target : <0x00167634> { _bfin_rotary_probe + 0x4c }
> Source : <0x00167626> { _bfin_rotary_probe + 0x3e } IF CC JUMP pcrel
> 11 Target : <0x0016761e> { _bfin_rotary_probe + 0x36 }
> Source : <0x000d9c04> { _devm_ioremap_resource + 0x38 } RTS
> 12 Target : <0x000d9bfe> { _devm_ioremap_resource + 0x32 }
> Source : <0x000d9c46> { _devm_ioremap_resource + 0x7a } IF !CC
> JUMP pcrel (BP)
> 13 Target : <0x000d9c44> { _devm_ioremap_resource + 0x78 }
> Source : <0x000d9b58> { _devm_ioremap_nocache + 0x3c } RTS
> 14 Target : <0x000d9b50> { _devm_ioremap_nocache + 0x34 }
> Source : <0x00103bc8> { _devres_add + 0x48 } RTS
> 15 Target : <0x00103b9c> { _devres_add + 0x1c }
> Source : <0x00103b96> { _devres_add + 0x16 } IF CC JUMP pcrel
> Kernel Stack
> Stack info:
> SP: [0x04027d58] <0x04027d58> /* kernel dynamic memory (maybe user-space) */
> Memory from 0x04027d50 to 04028000
> 04027d50: 000cda8c 0447f160 [04027d84] 00101cb4 002e7bd8 00301794
> 002fab6c 002e7c0c
> 04027d70: 04027da4 00301794 0030c310 04027da8 000cddc0 04027dac
> <00100950> 00101c4c
> 04027d90: 00301794 00000000 00000000 00000000 04027dec 040225ac
> 04070af0 04027dd4
> 04027db0: 0010199a 0447f160 048a7d80 002c6018 00000000 04027df0
> 04027dec 04027df0
> 04027dd0: 00101c4c 04027df0 00100f50 04027dfc 001020d8 00301794
> 002788e0 00271bb8
> 04027df0: 04027e14 001021ba 00301794 002e5234 00319710 048a7d80
> 04027e54 00273210
> 04027e10: 048a7d80 04027e30 00102f8e 002e5234 048a7d80 000d4b8a
> 04027ea0 0000105a
> 04027e30: 04027e44 00319722 00319710 048a7d80 002c6018 04027ea0
> <0000106e><00100100>
> 04027e50: 00200200 00319710 00000000 04027e94 04027e00 0030c322
> 04027e98 00026130
> 04027e70: 00325c64 04027e9c <0001bcde> 00000063 0081453f 002ea330
> 00216528 00000000
> 04027e90: 00000000 00000006 00000006 04027edc 04027edc 0030c28e
> 00325ef0 0031fc48
> 04027eb0: 0031fc28 00000007 002c6018 00000063 00291fb0 a8824141
> 002c56e0 00000063
> 04027ed0: 00000006 00000006 0030c310 04027f0c 0021402e 00216528
> 04025a20 040256e0
> 04027ef0: 040258c8 002ea284 002ea330 00216528 ffa00006 00216528
> 040258c8 0402feb0
> 04027f10:<ffa00014> 00216528 28060484 00214024 00000000 00000000
> 00008000 00000000
> 04027f30: 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000
> 04027f50: 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000
> 04027f70: 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000
> 04027f90: 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000
> 04027fb0: 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000
> 04027fd0: 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000
> 04027ff0: 00000000 00000000 ffffffff 00002806
> Return addresses in stack:
> address : <0x00100950> { _bus_for_each_dev + 0x5c }
> address : <0x0000106e> { _do_one_initcall + 0x6e }
> address : <0x00100100> { _device_add + 0x3b4 }
> address : <0x0001bcde> { _parse_args + 0x12e }
> address : <0xffa00014> { _ret_from_fork + 0x14 }
> Modules linked in:
> Kernel panic - not syncing: Kernel exception
> ---[ end Kernel panic - not syncing: Kernel exception
>
>
> Regards,
>
> Sonic Zhang
--
Dmitry
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