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scsi: qla2xxx: Fix extraneous ref on sp's after adapter break 

Hung task timeouts can result if a qlogic board breaks unexpectedly
while running I/O. These tasks become hung because command srb reference
counts are not going to zero, hence the affected srbs and commands do
not get freed. This fix accounts for this extra reference in the srbs in
the case of a board failure.

Fixes: a465537ad1 ("qla2xxx: Disable the adapter and skip error recovery in case of register disconnect")
Signed-off-by: Bill Kuzeja <william.kuzeja@stratus.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bill Kuzeja 2017-05-25 15:26:31 -04:00 committed by Martin K. Petersen
parent e6ef6a77f5
commit 4cd3b6ebff
1 changed files with 6 additions and 2 deletions
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8
drivers/scsi/qla2xxx/qla_os.c
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@ -1640,7 +1640,7 @@ qla2x00_loop_reset(scsi_qla_host_t *vha)
void
qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
{
int que, cnt;
int que, cnt, status;
unsigned long flags;
srb_t *sp;
struct qla_hw_data *ha = vha->hw;
@ -1670,8 +1670,12 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
*/
sp_get(sp);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
qla2xxx_eh_abort(GET_CMD_SP(sp));
status = qla2xxx_eh_abort(GET_CMD_SP(sp));
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Get rid of extra reference if immediate exit
* from ql2xxx_eh_abort */
if (status == FAILED && (qla2x00_isp_reg_stat(ha)))
atomic_dec(&sp->ref_count);
}
req->outstanding_cmds[cnt] = NULL;
sp->done(sp, res);