From: Bill Kuzeja William.Kuzeja@stratus.com
[ Upstream commit 4cd3b6ebff8510b2139d64024411207090cfe0a9 ]
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: a465537ad1a4 ("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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/scsi/qla2xxx/qla_os.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 94630d4738e6..baccd116f864 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -1443,7 +1443,7 @@ 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; @@ -1473,8 +1473,12 @@ 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(vha, sp, res);