On 12/22/2015 02:18 AM, Finn Thain wrote:
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@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/NCR5380.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
