From e3eac12442c2678d64b655e9768bda1be65e0b68 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Tue, 23 May 2017 16:48:37 -0700 Subject: 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 Reviewed-by: Juergen Gross Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: David Disseldorp Cc: xen-devel@lists.xenproject.org Signed-off-by: Nicholas Bellinger --- drivers/xen/xen-scsiback.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) (limited to 'drivers/xen/xen-scsiback.c') 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) -- cgit v1.2.3