[PATCH AUTOSEL 5.4 167/330] scsi: aacraid: Disabling TM path and only processing IOP reset

From: Sasha Levin
Date: Thu Sep 17 2020 - 22:04:51 EST


From: Sagar Biradar <Sagar.Biradar@xxxxxxxxxxxxx>

[ Upstream commit bef18d308a2215eff8c3411a23d7f34604ce56c3 ]

Fixes the occasional adapter panic when sg_reset is issued with -d, -t, -b
and -H flags. Removal of command type HBA_IU_TYPE_SCSI_TM_REQ in
aac_hba_send since iu_type, request_id and fib_flags are not populated.
Device and target reset handlers are made to send TMF commands only when
reset_state is 0.

Link: https://lore.kernel.org/r/1581553771-25796-1-git-send-email-Sagar.Biradar@xxxxxxxxxxxxx
Reviewed-by: Sagar Biradar <Sagar.Biradar@xxxxxxxxxxxxx>
Signed-off-by: Sagar Biradar <Sagar.Biradar@xxxxxxxxxxxxx>
Signed-off-by: Balsundar P <balsundar.p@xxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/scsi/aacraid/commsup.c | 2 +-
drivers/scsi/aacraid/linit.c | 34 +++++++++++++++++++++++++---------
2 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index 2142a649e865b..90fb17c5dd69c 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -728,7 +728,7 @@ int aac_hba_send(u8 command, struct fib *fibptr, fib_callback callback,
hbacmd->request_id =
cpu_to_le32((((u32)(fibptr - dev->fibs)) << 2) + 1);
fibptr->flags |= FIB_CONTEXT_FLAG_SCSI_CMD;
- } else if (command != HBA_IU_TYPE_SCSI_TM_REQ)
+ } else
return -EINVAL;


diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 4a858789e6c5e..514aed38b5afe 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -723,7 +723,11 @@ static int aac_eh_abort(struct scsi_cmnd* cmd)
status = aac_hba_send(HBA_IU_TYPE_SCSI_TM_REQ, fib,
(fib_callback) aac_hba_callback,
(void *) cmd);
-
+ if (status != -EINPROGRESS) {
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ return ret;
+ }
/* Wait up to 15 secs for completion */
for (count = 0; count < 15; ++count) {
if (cmd->SCp.sent_command) {
@@ -902,11 +906,11 @@ static int aac_eh_dev_reset(struct scsi_cmnd *cmd)

info = &aac->hba_map[bus][cid];

- if (info->devtype != AAC_DEVTYPE_NATIVE_RAW &&
- info->reset_state > 0)
+ if (!(info->devtype == AAC_DEVTYPE_NATIVE_RAW &&
+ !(info->reset_state > 0)))
return FAILED;

- pr_err("%s: Host adapter reset request. SCSI hang ?\n",
+ pr_err("%s: Host device reset request. SCSI hang ?\n",
AAC_DRIVERNAME);

fib = aac_fib_alloc(aac);
@@ -921,7 +925,12 @@ static int aac_eh_dev_reset(struct scsi_cmnd *cmd)
status = aac_hba_send(command, fib,
(fib_callback) aac_tmf_callback,
(void *) info);
-
+ if (status != -EINPROGRESS) {
+ info->reset_state = 0;
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ return ret;
+ }
/* Wait up to 15 seconds for completion */
for (count = 0; count < 15; ++count) {
if (info->reset_state == 0) {
@@ -960,11 +969,11 @@ static int aac_eh_target_reset(struct scsi_cmnd *cmd)

info = &aac->hba_map[bus][cid];

- if (info->devtype != AAC_DEVTYPE_NATIVE_RAW &&
- info->reset_state > 0)
+ if (!(info->devtype == AAC_DEVTYPE_NATIVE_RAW &&
+ !(info->reset_state > 0)))
return FAILED;

- pr_err("%s: Host adapter reset request. SCSI hang ?\n",
+ pr_err("%s: Host target reset request. SCSI hang ?\n",
AAC_DRIVERNAME);

fib = aac_fib_alloc(aac);
@@ -981,6 +990,13 @@ static int aac_eh_target_reset(struct scsi_cmnd *cmd)
(fib_callback) aac_tmf_callback,
(void *) info);

+ if (status != -EINPROGRESS) {
+ info->reset_state = 0;
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ return ret;
+ }
+
/* Wait up to 15 seconds for completion */
for (count = 0; count < 15; ++count) {
if (info->reset_state <= 0) {
@@ -1033,7 +1049,7 @@ static int aac_eh_bus_reset(struct scsi_cmnd* cmd)
}
}

- pr_err("%s: Host adapter reset request. SCSI hang ?\n", AAC_DRIVERNAME);
+ pr_err("%s: Host bus reset request. SCSI hang ?\n", AAC_DRIVERNAME);

/*
* Check the health of the controller
--
2.25.1