diff options
| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-05-24 01:48:37 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2017-07-07 07:58:02 +0200 |
| commit | e3eac12442c2678d64b655e9768bda1be65e0b68 (patch) | |
| tree | b2e70fd0f8f85c5147204970c5d78f7f0054b59e /drivers/xen/xen-scsiback.c | |
| parent | xen/scsiback: Fix a TMR related use-after-free (diff) | |
| download | linux-e3eac12442c2678d64b655e9768bda1be65e0b68.tar.xz linux-e3eac12442c2678d64b655e9768bda1be65e0b68.zip | |
xen/scsiback: Replace a waitqueue and a counter by a completion
This patch simplifies the implementation of the scsiback driver
but does not change its behavior.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: David Disseldorp <ddiss@suse.de>
Cc: xen-devel@lists.xenproject.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/xen/xen-scsiback.c')
| -rw-r--r-- | drivers/xen/xen-scsiback.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c index 980f32817305..4cb33a0916a8 100644 --- a/drivers/xen/xen-scsiback.c +++ b/drivers/xen/xen-scsiback.c @@ -135,8 +135,7 @@ struct vscsibk_pend { struct se_cmd se_cmd; - atomic_t tmr_complete; - wait_queue_head_t tmr_wait; + struct completion tmr_done; }; #define VSCSI_DEFAULT_SESSION_TAGS 128 @@ -600,7 +599,7 @@ static void scsiback_device_action(struct vscsibk_pend *pending_req, u64 unpacked_lun = pending_req->v2p->lun; int rc, err = FAILED; - init_waitqueue_head(&pending_req->tmr_wait); + init_completion(&pending_req->tmr_done); rc = target_submit_tmr(&pending_req->se_cmd, nexus->tvn_se_sess, &pending_req->sense_buffer[0], @@ -609,8 +608,7 @@ static void scsiback_device_action(struct vscsibk_pend *pending_req, if (rc) goto err; - wait_event(pending_req->tmr_wait, - atomic_read(&pending_req->tmr_complete)); + wait_for_completion(&pending_req->tmr_done); err = (se_cmd->se_tmr_req->response == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED; @@ -1443,8 +1441,7 @@ static void scsiback_queue_tm_rsp(struct se_cmd *se_cmd) struct vscsibk_pend *pending_req = container_of(se_cmd, struct vscsibk_pend, se_cmd); - atomic_set(&pending_req->tmr_complete, 1); - wake_up(&pending_req->tmr_wait); + complete(&pending_req->tmr_done); } static void scsiback_aborted_task(struct se_cmd *se_cmd) |