summaryrefslogtreecommitdiff
path: root/drivers/scsi
diff options
context:
space:
mode:
authorBart Van Assche <bart.vanassche@wdc.com>2017-08-31 02:58:42 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-09-01 06:09:49 +0300
commita45a1f3614182267803baadba657b59e2ddc0545 (patch)
tree0037ff3d93bb03e8b5578844447668afd2f0c4d6 /drivers/scsi
parentcad8cf20a65f3d6cd70719bd0fec2d54546b12ef (diff)
downloadlinux-a45a1f3614182267803baadba657b59e2ddc0545.tar.xz
scsi: scsi-mq: Always unprepare before requeuing a request
One of the two scsi-mq functions that requeue a request unprepares a request before requeueing (scsi_io_completion()) but the other function not (__scsi_queue_insert()). Make sure that a request is unprepared before requeuing it. Fixes: commit d285203cf647 ("scsi: add support for a blk-mq based I/O path.") Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.com> Cc: Damien Le Moal <damien.lemoal@wdc.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_lib.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 6085377643ae..9cf6a80fe297 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -44,6 +44,8 @@ static struct kmem_cache *scsi_sense_cache;
static struct kmem_cache *scsi_sense_isadma_cache;
static DEFINE_MUTEX(scsi_sense_cache_mutex);
+static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd);
+
static inline struct kmem_cache *
scsi_select_sense_cache(bool unchecked_isa_dma)
{
@@ -140,6 +142,12 @@ static void scsi_mq_requeue_cmd(struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
+ if (cmd->request->rq_flags & RQF_DONTPREP) {
+ cmd->request->rq_flags &= ~RQF_DONTPREP;
+ scsi_mq_uninit_cmd(cmd);
+ } else {
+ WARN_ON_ONCE(true);
+ }
blk_mq_requeue_request(cmd->request, true);
put_device(&sdev->sdev_gendev);
}
@@ -982,8 +990,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
* A new command will be prepared and issued.
*/
if (q->mq_ops) {
- cmd->request->rq_flags &= ~RQF_DONTPREP;
- scsi_mq_uninit_cmd(cmd);
scsi_mq_requeue_cmd(cmd);
} else {
scsi_release_buffers(cmd);