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| author | Mahesh Rajashekhara <Mahesh.Rajashekhara@microchip.com> | 2022-07-08 13:47:36 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-07-13 23:42:04 -0400 |
| commit | 69695aeaa6621bc49cdd7a8e5a8d1042461e496e (patch) | |
| tree | 5ae2ccf6b06086b348ee926b9453af8d7a85b7b1 | |
| parent | 85b41834b0f43b3e5c079ea9ea9288b2568b8c60 (diff) | |
| download | linux-69695aeaa6621bc49cdd7a8e5a8d1042461e496e.tar.gz linux-69695aeaa6621bc49cdd7a8e5a8d1042461e496e.tar.bz2 linux-69695aeaa6621bc49cdd7a8e5a8d1042461e496e.zip | |
scsi: smartpqi: Fix DMA direction for RAID requests
Correct a SOP READ and WRITE DMA flags for some requests.
This update corrects DMA direction issues with SCSI commands removed from
the controller's internal lookup table.
Currently, SCSI READ BLOCK LIMITS (0x5) was removed from the controller
lookup table and exposed a DMA direction flag issue.
SCSI READ BLOCK LIMITS was recently removed from our controller lookup
table so the controller uses the respective IU flag field to set the DMA
data direction. Since the DMA direction is incorrect the FW never completes
the request causing a hang.
Some SCSI commands which use SCSI READ BLOCK LIMITS
* sg_map
* mt -f /dev/stX status
After updating controller firmware, users may notice their tape units
failing. This patch resolves the issue.
Also, the AIO path DMA direction is correct.
The DMA direction flag is a day-one bug with no reported BZ.
Fixes: 6c223761eb54 ("smartpqi: initial commit of Microsemi smartpqi driver")
Link: https://lore.kernel.org/r/165730605618.177165.9054223644512926624.stgit@brunhilda
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Mahesh Rajashekhara <Mahesh.Rajashekhara@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi_init.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 96b206ab5ecf..51b5a11efa9c 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -5500,10 +5500,10 @@ static int pqi_raid_submit_scsi_cmd_with_io_request( } switch (scmd->sc_data_direction) { - case DMA_TO_DEVICE: + case DMA_FROM_DEVICE: request->data_direction = SOP_READ_FLAG; break; - case DMA_FROM_DEVICE: + case DMA_TO_DEVICE: request->data_direction = SOP_WRITE_FLAG; break; case DMA_NONE: |