The previous commit ("qla2xxx: fix invalid DMA access after command
aborts in PCI device remove") introduced a regression during an EEH
recovery, since the change to the qla2x00_abort_all_cmds() function
calls qla2xxx_eh_abort(), which verifies the EEH recovery condition
but handles it heavy-handed. (commit a465537ad1a4 "qla2xxx: Disable
the adapter and skip error recovery in case of register disconnect.")
This problem warrants a more general/optimistic solution right into
qla2xxx_eh_abort() (eg in case a real command abort arrives during
EEH recovery, or if it takes long enough to trigger command aborts);
but it's still worth to add a check to ensure the code added by the
previous commit is correct and contained within its owner function.
This commit just adds a 'if (!ha->flags.eeh_busy)' check around it.
(ahem; a trivial fix for this -rc series; sorry for this oversight.)
With it applied, both PCI device remove and EEH recovery works fine.
Fixes: 1535aa75a3d8 ("scsi: qla2xxx: fix invalid DMA access after
command aborts in PCI device remove")
Signed-off-by: Mauricio Faria de Oliveira <mauri...@linux.vnet.ibm.com>
---
drivers/scsi/qla2xxx/qla_os.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 567fa080e261..56d6142852a5 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1456,15 +1456,20 @@ uint32_t qla2x00_isp_reg_stat(struct qla_hw_data *ha)
for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
sp = req->outstanding_cmds[cnt];
if (sp) {
- /* Get a reference to the sp and drop the lock.
- * The reference ensures this sp->done() call
- * - and not the call in qla2xxx_eh_abort() -
- * ends the SCSI command (with result 'res').
+ /* Don't abort commands in adapter during EEH
+ * recovery as it's not accessible/responding.
*/
- sp_get(sp);
- spin_unlock_irqrestore(&ha->hardware_lock,
flags);
- qla2xxx_eh_abort(GET_CMD_SP(sp));
- spin_lock_irqsave(&ha->hardware_lock, flags);
+ if (!ha->flags.eeh_busy) {
+ /* Get a reference to the sp and drop
the lock.
+ * The reference ensures this
sp->done() call
+ * - and not the call in
qla2xxx_eh_abort() -
+ * ends the SCSI command (with result
'res').
+ */
+ sp_get(sp);
+
spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ qla2xxx_eh_abort(GET_CMD_SP(sp));
+ spin_lock_irqsave(&ha->hardware_lock,
flags);
+ }
req->outstanding_cmds[cnt] = NULL;
sp->done(vha, sp, res);
}
--
1.8.3.1
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