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scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts 

Ensure SRB is returned during I/O timeout error escalation. If that is not
possible fail the escalation path.

Following crash stack was seen:

BUG: unable to handle kernel paging request at 0000002f56aa90f8
IP: qla_chk_edif_rx_sa_delete_pending+0x14/0x30 [qla2xxx]
Call Trace:
 ? qla2x00_status_entry+0x19f/0x1c50 [qla2xxx]
 ? qla2x00_start_sp+0x116/0x1170 [qla2xxx]
 ? dma_pool_alloc+0x1d6/0x210
 ? mempool_alloc+0x54/0x130
 ? qla24xx_process_response_queue+0x548/0x12b0 [qla2xxx]
 ? qla_do_work+0x2d/0x40 [qla2xxx]
 ? process_one_work+0x14c/0x390

Link: https://lore.kernel.org/r/20220616053508.27186-6-njavali@marvell.com
Fixes: d74595278f ("scsi: qla2xxx: Add multiple queue pair functionality.")
Cc: stable@vger.kernel.org
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Arun Easi 2022-06-15 22:35:02 -07:00 committed by Martin K. Petersen
parent 5304673bdb
commit c39587bc0a
1 changed files with 31 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/scsi/qla2xxx/qla_os.c
View File

@ -1342,21 +1342,20 @@ qla2xxx_eh_abort(struct scsi_cmnd *cmd)
/*
* Returns: QLA_SUCCESS or QLA_FUNCTION_FAILED.
*/
int
qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *vha, unsigned int t,
uint64_t l, enum nexus_wait_type type)
static int
__qla2x00_eh_wait_for_pending_commands(struct qla_qpair *qpair, unsigned int t,
uint64_t l, enum nexus_wait_type type)
{
int cnt, match, status;
unsigned long flags;
struct qla_hw_data *ha = vha->hw;
struct req_que *req;
scsi_qla_host_t *vha = qpair->vha;
struct req_que *req = qpair->req;
srb_t *sp;
struct scsi_cmnd *cmd;
status = QLA_SUCCESS;
spin_lock_irqsave(&ha->hardware_lock, flags);
req = vha->req;
spin_lock_irqsave(qpair->qp_lock_ptr, flags);
for (cnt = 1; status == QLA_SUCCESS &&
cnt < req->num_outstanding_cmds; cnt++) {
sp = req->outstanding_cmds[cnt];
@ -1383,15 +1382,35 @@ qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *vha, unsigned int t,
if (!match)
continue;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
status = qla2x00_eh_wait_on_command(cmd);
spin_lock_irqsave(&ha->hardware_lock, flags);
spin_lock_irqsave(qpair->qp_lock_ptr, flags);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
return status;
}
int
qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *vha, unsigned int t,
uint64_t l, enum nexus_wait_type type)
{
struct qla_qpair *qpair;
struct qla_hw_data *ha = vha->hw;
int i, status = QLA_SUCCESS;
status = __qla2x00_eh_wait_for_pending_commands(ha->base_qpair, t, l,
type);
for (i = 0; status == QLA_SUCCESS && i < ha->max_qpairs; i++) {
qpair = ha->queue_pair_map[i];
if (!qpair)
continue;
status = __qla2x00_eh_wait_for_pending_commands(qpair, t, l,
type);
}
return status;
}
static char *reset_errors[] = {
"HBA not online",
"HBA not ready",
@ -1425,7 +1444,7 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
return err;
if (fcport->deleted)
return SUCCESS;
return FAILED;
ql_log(ql_log_info, vha, 0x8009,
"DEVICE RESET ISSUED nexus=%ld:%d:%llu cmd=%p.\n", vha->host_no,
@ -1493,7 +1512,7 @@ qla2xxx_eh_target_reset(struct scsi_cmnd *cmd)
return err;
if (fcport->deleted)
return SUCCESS;
return FAILED;
ql_log(ql_log_info, vha, 0x8009,
"TARGET RESET ISSUED nexus=%ld:%d cmd=%p.\n", vha->host_no,