diff mbox series

[1/5] scsi: core: Remove reserved request time-out handling

Message ID 1655463320-241202-2-git-send-email-john.garry@huawei.com (mailing list archive)
State New, archived
Headers show
Series blk-mq: Add a flag for reserved requests series | expand

Commit Message

John Garry June 17, 2022, 10:55 a.m. UTC
The SCSI code does not currently support reserved commands. As such,
requests which time-out would never be reserved, and scsi_timeout()
'reserved' arg should never be set.

Remove handling for reserved requests and drop wrapper scsi_timeout() as
it now just calls scsi_times_out() always.

Signed-off-by: John Garry <john.garry@huawei.com>
---
 drivers/scsi/scsi_error.c |  3 ++-
 drivers/scsi/scsi_lib.c   | 12 ++----------
 drivers/scsi/scsi_priv.h  |  3 ++-
 3 files changed, 6 insertions(+), 12 deletions(-)

Comments

Bart Van Assche June 17, 2022, 4:25 p.m. UTC | #1
On 6/17/22 03:55, John Garry wrote:
> The SCSI code does not currently support reserved commands. As such,
> requests which time-out would never be reserved, and scsi_timeout()
> 'reserved' arg should never be set.
> 
> Remove handling for reserved requests and drop wrapper scsi_timeout() as
> it now just calls scsi_times_out() always.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Christoph Hellwig June 20, 2022, 5:58 a.m. UTC | #2
On Fri, Jun 17, 2022 at 06:55:16PM +0800, John Garry wrote:
> The SCSI code does not currently support reserved commands. As such,
> requests which time-out would never be reserved, and scsi_timeout()
> 'reserved' arg should never be set.
> 
> Remove handling for reserved requests and drop wrapper scsi_timeout() as
> it now just calls scsi_times_out() always.

Please rename scsi_times_out to scsi_timeout so it still matches the
method name.

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
John Garry June 20, 2022, 7:37 a.m. UTC | #3
On 20/06/2022 06:58, Christoph Hellwig wrote:
> On Fri, Jun 17, 2022 at 06:55:16PM +0800, John Garry wrote:
>> The SCSI code does not currently support reserved commands. As such,
>> requests which time-out would never be reserved, and scsi_timeout()
>> 'reserved' arg should never be set.
>>
>> Remove handling for reserved requests and drop wrapper scsi_timeout() as
>> it now just calls scsi_times_out() always.
> 
> Please rename scsi_times_out to scsi_timeout so it still matches the
> method name.
>

ok, note that some code comments and Documentation reference 
scsi_times_out() so I will need to fix them up also.


> Otherwise looks good:
> 
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> 
> .

Cheers,
John
Hannes Reinecke June 20, 2022, 9:14 a.m. UTC | #4
On 6/17/22 12:55, John Garry wrote:
> The SCSI code does not currently support reserved commands. As such,
> requests which time-out would never be reserved, and scsi_timeout()
> 'reserved' arg should never be set.
> 
> Remove handling for reserved requests and drop wrapper scsi_timeout() as
> it now just calls scsi_times_out() always.
> 
> Signed-off-by: John Garry <john.garry@huawei.com>
> ---
>   drivers/scsi/scsi_error.c |  3 ++-
>   drivers/scsi/scsi_lib.c   | 12 ++----------
>   drivers/scsi/scsi_priv.h  |  3 ++-
>   3 files changed, 6 insertions(+), 12 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
diff mbox series

Patch

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 49ef864df581..80cd6835ac70 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -318,6 +318,7 @@  void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
 /**
  * scsi_times_out - Timeout function for normal scsi commands.
  * @req:	request that is timing out.
+ * @reserved:	whether the request is a reserved request.
  *
  * Notes:
  *     We do not need to lock this.  There is the potential for a race
@@ -325,7 +326,7 @@  void scsi_eh_scmd_add(struct scsi_cmnd *scmd)
  *     normal completion function determines that the timer has already
  *     fired, then it mustn't do anything.
  */
-enum blk_eh_timer_return scsi_times_out(struct request *req)
+enum blk_eh_timer_return scsi_times_out(struct request *req, bool reserved)
 {
 	struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
 	enum blk_eh_timer_return rtn = BLK_EH_DONE;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 6ffc9e4258a8..d635831165d5 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1790,14 +1790,6 @@  static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
 	return ret;
 }
 
-static enum blk_eh_timer_return scsi_timeout(struct request *req,
-		bool reserved)
-{
-	if (reserved)
-		return BLK_EH_RESET_TIMER;
-	return scsi_times_out(req);
-}
-
 static int scsi_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
 				unsigned int hctx_idx, unsigned int numa_node)
 {
@@ -1912,7 +1904,7 @@  static const struct blk_mq_ops scsi_mq_ops_no_commit = {
 	.put_budget	= scsi_mq_put_budget,
 	.queue_rq	= scsi_queue_rq,
 	.complete	= scsi_complete,
-	.timeout	= scsi_timeout,
+	.timeout	= scsi_times_out,
 #ifdef CONFIG_BLK_DEBUG_FS
 	.show_rq	= scsi_show_rq,
 #endif
@@ -1941,7 +1933,7 @@  static const struct blk_mq_ops scsi_mq_ops = {
 	.queue_rq	= scsi_queue_rq,
 	.commit_rqs	= scsi_commit_rqs,
 	.complete	= scsi_complete,
-	.timeout	= scsi_timeout,
+	.timeout	= scsi_times_out,
 #ifdef CONFIG_BLK_DEBUG_FS
 	.show_rq	= scsi_show_rq,
 #endif
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 5c4786310a31..8966f20b7d55 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -72,7 +72,8 @@  extern void scsi_exit_devinfo(void);
 
 /* scsi_error.c */
 extern void scmd_eh_abort_handler(struct work_struct *work);
-extern enum blk_eh_timer_return scsi_times_out(struct request *req);
+extern enum blk_eh_timer_return scsi_times_out(struct request *req,
+					       bool reserved);
 extern int scsi_error_handler(void *host);
 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd);
 extern void scsi_eh_wakeup(struct Scsi_Host *shost);