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

John Garry
2022-06-17T11:01:46Z

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(-)

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);
--
2.35.3