svn commit: r235020 - projects/iscsi_opt/sys/dev/iscsi/initiator
Kip Macy
kmacy at FreeBSD.org
Fri May 4 17:12:31 UTC 2012
Author: kmacy
Date: Fri May 4 17:12:31 2012
New Revision: 235020
URL: http://svn.freebsd.org/changeset/base/235020
Log:
check that the queue wasn't already frozen while we didn't hold the lock
Modified:
projects/iscsi_opt/sys/dev/iscsi/initiator/isc_cam.c
Modified: projects/iscsi_opt/sys/dev/iscsi/initiator/isc_cam.c
==============================================================================
--- projects/iscsi_opt/sys/dev/iscsi/initiator/isc_cam.c Fri May 4 17:02:34 2012 (r235019)
+++ projects/iscsi_opt/sys/dev/iscsi/initiator/isc_cam.c Fri May 4 17:12:31 2012 (r235020)
@@ -251,18 +251,16 @@ ic_action(struct cam_sim *sim, union ccb
if (rc == EWOULDBLOCK) {
if ((sp->cam_flags & ISC_QFROZEN) == 0) {
- int freeze_count = xpt_freeze_simq(sim, 1);
- sp->cam_flags |= ISC_QFROZEN;
CAM_UNLOCK(sp);
SOCKBUF_LOCK(&sp->soc->so_snd);
CAM_LOCK(sp);
- if (sp->cam_sim->devq->send_queue.qfrozen_cnt[0] != freeze_count) {
- printf("lost race when acquiring socket buffer lock qfrozen_cnt=%d freeze_count=%d\n", sp->cam_sim->devq->send_queue.qfrozen_cnt[0], freeze_count);
- sp->cam_sim->devq->send_queue.qfrozen_cnt[0] = freeze_count;
+ if ((sp->cam_flags & ISC_QFROZEN) == 0) {
+ sp->cam_flags |= ISC_QFROZEN;
+ xpt_freeze_simq(sim, 1);
+ soupcall_set(sp->soc, SO_SND, isc_so_snd_upcall, sp);
}
- soupcall_set(sp->soc, SO_SND, isc_so_snd_upcall, sp);
+ /* else we lost the race and someone else froze it for us oh well */
SOCKBUF_UNLOCK(&sp->soc->so_snd);
-
}
status = ccb->ccb_h.status &= ~CAM_STATUS_MASK;
csio->ccb_h.status = status | CAM_REQUEUE_REQ;
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