diff options
| author | Minwoo Im <[email protected]> | 2024-06-01 06:22:44 +0900 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2024-06-04 22:14:21 -0400 |
| commit | a420a8ed0a92488a04b34dfc262101c87940c800 (patch) | |
| tree | 65e5d4c93c8196b3292231664ef454724a61edaf | |
| parent | 175d1825ca4d2288fee734ada0955a1e36dd50e6 (diff) | |
scsi: ufs: mcq: Prevent no I/O queue case for MCQ
If hba_maxq equals poll_queues, which means there are no I/O queues
(HCTX_TYPE_DEFAULT, HCTX_TYPE_READ), the very first hw queue will be
allocated as HCTX_TYPE_POLL and it will be used as the dev_cmd_queue. In
this case, device commands such as QUERY cannot be properly handled.
This patch prevents the initialization of MCQ when the number of I/O queues
is not set and only the number of POLL queues is set.
Signed-off-by: Minwoo Im <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
| -rw-r--r-- | drivers/ufs/core/ufs-mcq.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c index 46faa54aea94..4bcae410c268 100644 --- a/drivers/ufs/core/ufs-mcq.c +++ b/drivers/ufs/core/ufs-mcq.c @@ -179,6 +179,15 @@ static int ufshcd_mcq_config_nr_queues(struct ufs_hba *hba) return -EOPNOTSUPP; } + /* + * Device should support at least one I/O queue to handle device + * commands via hba->dev_cmd_queue. + */ + if (hba_maxq == poll_queues) { + dev_err(hba->dev, "At least one non-poll queue required\n"); + return -EOPNOTSUPP; + } + rem = hba_maxq; if (rw_queues) { |