[PATCH v2 01/18] scsi: libsas: Handle non-TMF codes in sas_scsi_find_task()

John Garry
2022-02-17T15:48:32Z

LLDD TMF callbacks may return linux or other error codes instead of TMF
codes. This may cause problems in sas_scsi_find_task() ->
.lldd_query_task(), as only TMF codes are handled there. As such, we may
not return a task_disposition type from sas_scsi_find_task(). Function
sas_eh_handle_sas_errors() only handles that type, and will only progress
error handling for those recognised types.

Return TASK_ABORT_FAILED upon exit on the assumption that the command may
still be alive and error handling should be escalated.

Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/libsas/sas_scsi_host.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index bcb391b0c7ed..19cb954afd80 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -316,11 +316,13 @@ static enum task_disposition sas_scsi_find_task(struct sas_task *task)
pr_notice("%s: task 0x%p failed to abort\n",
__func__, task);
return TASK_ABORT_FAILED;
+ default:
+ pr_notice("%s: task 0x%p result code %d not handled\n",
+ __func__, task, res);
}
-
}
}
- return res;
+ return TASK_ABORT_FAILED;
}

static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd)
--
2.26.2