RE: [PATCH] scsi/mvsas: Fix oops when ata command timeout.

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Hi, Jianpeng

I think MVSAS shouldn't care the completion sign here, just modify task state is ok.



> -----Original Message-----
> From: majianpeng [mailto:majianpeng@xxxxxxxxx]
> Sent: 2012年8月1日 15:15
> To: JBottomley
> Cc: Xiangliang Yu; linux-scsi
> Subject: [PATCH] scsi/mvsas: Fix oops when ata command timeout.
> 
> Kernel message follows:
> 
> [  511.712011] sd 11:0:0:0: [sdf] command ffff8800a4e81400 timed out
> [  511.712022] sas: Enter sas_scsi_recover_host busy: 1 failed: 1
> [  511.712024] sas: trying to find task 0xffff8800a4d24c80
> [  511.712026] sas: sas_scsi_find_task: aborting task 0xffff8800a4d24c80
> [  511.712029] drivers/scsi/mvsas/mv_sas.c 1631:mvs_abort_task()
> mvi=ffff8800b5300000 task=ffff8800a4d24c80 slot=ffff8800b5325038
> slot_idx=x0
> [  511.712035] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000058
> [  511.712040] IP: [<ffffffff815f8c0c>] _raw_spin_lock_irqsave+0xc/0x30
> [  511.712047] PGD 0
> [  511.712049] Oops: 0002 [#1] SMP
> [  511.712052] Modules linked in: mvsas libsas scsi_transport_sas raid456
> async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx [last
> unloaded: mvsas]
> [  511.712062] CPU 3
> [  511.712066] Pid: 7322, comm: scsi_eh_11 Not tainted 3.5.0+ #106 To Be Filled
> By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M.
> [  511.712068] RIP: 0010:[<ffffffff815f8c0c>]  [<ffffffff815f8c0c>]
> _raw_spin_lock_irqsave+0xc/0x30
> [  511.712073] RSP: 0018:ffff880098d3bcb0  EFLAGS: 00010086
> [  511.712074] RAX: 0000000000000286 RBX: 0000000000000058 RCX:
> 00000000000000c3
> [  511.712076] RDX: 0000000000000100 RSI: 0000000000000046 RDI:
> 0000000000000058
> [  511.712078] RBP: ffff880098d3bcb0 R08: 000000000000000a R09:
> 0000000000000000
> [  511.712080] R10: 00000000000004e8 R11: 00000000000004e7 R12:
> ffff8800a4d24c80
> [  511.712082] R13: 0000000000000050 R14: ffff8800b5325038 R15:
> ffff8800a4eafe00
> [  511.712084] FS:  0000000000000000(0000) GS:ffff8800bdb80000(0000)
> knlGS:0000000000000000
> [  511.712086] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [  511.712088] CR2: 0000000000000058 CR3: 00000000a4ce6000 CR4:
> 00000000000407e0
> [  511.712090] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [  511.712091] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [  511.712093] Process scsi_eh_11 (pid: 7322, threadinfo ffff880098d3a000,
> task ffff8800a61dde40)
> [  511.712095] Stack:
> [  511.712096]  ffff880098d3bce0 ffffffff81060683 ffff880000000000
> 0000000000000000
> [  511.712099]  ffff8800a4d24c80 ffff8800b5300000 ffff880098d3bcf0
> ffffffffa0076a88
> [  511.712102]  ffff880098d3bd50 ffffffffa0079bb5 ffff880000000000
> ffff880000000018
> [  511.712106] Call Trace:
> [  511.712110]  [<ffffffff81060683>] complete+0x23/0x60
> [  511.712115]  [<ffffffffa0076a88>] mvs_tmf_timedout+0x18/0x20 [mvsas]
> [  511.712119]  [<ffffffffa0079bb5>] mvs_slot_complete+0x765/0x7d0 [mvsas]
> [  511.712125]  [<ffffffffa005a17d>] sas_scsi_recover_host+0x55d/0xdb0
> [libsas]
> [  511.712128]  [<ffffffff8106d600>] ? idle_balance+0xe0/0x130
> [  511.712133]  [<ffffffff813b150c>] scsi_error_handler+0xcc/0x470
> [  511.712136]  [<ffffffff815f7ad0>] ? __schedule+0x370/0x730
> [  511.712139]  [<ffffffff8105f728>] ? __wake_up_common+0x58/0x90
> [  511.712142]  [<ffffffff813b1440>] ? scsi_eh_get_sense+0x110/0x110
> [  511.712146]  [<ffffffff810571be>] kthread+0x8e/0xa0
> [  511.712150]  [<ffffffff816015f4>] kernel_thread_helper+0x4/0x10
> [  511.712153]  [<ffffffff81057130>] ? flush_kthread_work+0x120/0x120
> [  511.712156]  [<ffffffff816015f0>] ? gs_change+0xb/0xb
> [  511.712157] Code: 8a 00 01 00 00 89 d0 f0 66 0f b1 0f 66 39 d0 0f 94 c0 0f
> b6 c0 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 9c 58 fa ba 00 01 00 00 <f0>
> 66 0f c1 17 0f b6 ce 38 d1 74 11 0f 1f 84 00 00 00 00 00 f3
> [  511.712191] RIP  [<ffffffff815f8c0c>] _raw_spin_lock_irqsave+0xc/0x30
> [  511.712194]  RSP <ffff880098d3bcb0>
> [  511.712196] CR2: 0000000000000058
> [  511.712198] ---[ end trace a781c7b1e65db92c ]---
> 
> Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
> ---
>  drivers/scsi/mvsas/mv_sas.c |    5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
> index 4539d59..af6a1c5 100644
> --- a/drivers/scsi/mvsas/mv_sas.c
> +++ b/drivers/scsi/mvsas/mv_sas.c
> @@ -1629,7 +1629,10 @@ int mvs_abort_task(struct sas_task *task)
>  			mv_dprintk("mvs_abort_task() mvi=%p task=%p "
>  				   "slot=%p slot_idx=x%x\n",
>  				   mvi, task, slot, slot_idx);
> -			mvs_tmf_timedout((unsigned long)task);
> +			if (task->slow_task != NULL)
> +				mvs_tmf_timedout((unsigned long)task);
> +			else
> +				task->task_state_flags |= SAS_TASK_STATE_ABORTED;
>  			mvs_slot_task_free(mvi, task, slot, slot_idx);
>  			rc = TMF_RESP_FUNC_COMPLETE;
>  			goto out;
> --
> 1.7.9.5
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