diff options
| author | Finn Thain <fthain@telegraphics.com.au> | 2016-01-03 05:05:28 (GMT) |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-01-07 02:42:57 (GMT) |
| commit | 9dafbd939a224b96868fd8db6909662a4cab5957 (patch) | |
| tree | cdaa712ac1b35dea2f91e8f88f8f8c286dbda157 /drivers/scsi/NCR5380.c | |
| parent | a2edc4a63b4f89016053fe5da3fdac3798f3e2ae (diff) | |
| download | linux-9dafbd939a224b96868fd8db6909662a4cab5957.tar.xz | |
ncr5380: Add missing lock in eh_abort_handler
The host spin lock needs to be acquired by NCR5380_abort() before it calls
NCR5380_select(). This patch doesn't actually fix the EH issues in this
driver but it does avoid this:
BUG: spinlock already unlocked on CPU#0, kworker/u4:1/14
lock: 0xc0c0f834, .magic: dead4ead, .owner: <none>/-1, .owner_cpu: -1
CPU: 0 PID: 14 Comm: kworker/u4:1 Not tainted 3.15.5 #5
Workqueue: scsi_tmf_4 scmd_eh_abort_handler
Call Trace:
[ef885d70] [c0008acc] show_stack+0x70/0x1bc (unreliable)
[ef885db0] [c0492a00] dump_stack+0x84/0x684
[ef885dc0] [c006f314] spin_dump+0xd0/0xe8
[ef885dd0] [c006f460] do_raw_spin_unlock+0xd4/0xd8
[ef885df0] [c0491c8c] _raw_spin_unlock_irq+0x10/0x3c
[ef885e00] [f381fe3c] NCR5380_select+0x3e4/0x6e8 [dmx3191d]
[ef885e40] [f382026c] NCR5380_abort+0x12c/0x190 [dmx3191d]
[ef885e60] [c02fec9c] scmd_eh_abort_handler+0x100/0x460
[ef885e80] [c0046470] process_one_work+0x16c/0x420
[ef885ea0] [c0046870] worker_thread+0x14c/0x430
[ef885ed0] [c004e4f4] kthread+0xd8/0xec
[ef885f40] [c00124d4] ret_from_kernel_thread+0x5c/0x64
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.c')
| -rw-r--r-- | drivers/scsi/NCR5380.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index 9b437e1..b46efaf 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -2374,6 +2374,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd) scmd_printk(KERN_WARNING, cmd, "aborting command\n"); + spin_lock_irq(instance->host_lock); NCR5380_print_status(instance); dprintk(NDEBUG_ABORT, "scsi%d : abort called\n", instance->host_no); @@ -2420,6 +2421,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd) REMOVE(5, *prev, tmp, tmp->host_scribble); (*prev) = (struct scsi_cmnd *) tmp->host_scribble; tmp->host_scribble = NULL; + spin_unlock_irq(instance->host_lock); tmp->result = DID_ABORT << 16; dprintk(NDEBUG_ABORT, "scsi%d : abort removed command from issue queue.\n", instance->host_no); tmp->scsi_done(tmp); @@ -2443,6 +2445,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd) */ if (hostdata->connected) { + spin_unlock_irq(instance->host_lock); dprintk(NDEBUG_ABORT, "scsi%d : abort failed, command connected.\n", instance->host_no); return FAILED; } @@ -2475,8 +2478,10 @@ static int NCR5380_abort(struct scsi_cmnd *cmd) if (cmd == tmp) { dprintk(NDEBUG_ABORT, "scsi%d : aborting disconnected command.\n", instance->host_no); - if (NCR5380_select(instance, cmd)) + if (NCR5380_select(instance, cmd)) { + spin_unlock_irq(instance->host_lock); return FAILED; + } dprintk(NDEBUG_ABORT, "scsi%d : nexus reestablished.\n", instance->host_no); do_abort(instance); @@ -2486,6 +2491,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd) REMOVE(5, *prev, tmp, tmp->host_scribble); *prev = (struct scsi_cmnd *) tmp->host_scribble; tmp->host_scribble = NULL; + spin_unlock_irq(instance->host_lock); tmp->result = DID_ABORT << 16; tmp->scsi_done(tmp); return SUCCESS; @@ -2500,6 +2506,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd) * so we won't panic, but we will notify the user in case something really * broke. */ + spin_unlock_irq(instance->host_lock); printk(KERN_WARNING "scsi%d : warning : SCSI command probably completed successfully\n" " before abortion\n", instance->host_no); return FAILED; |