Author: scottl
Date: Tue May 1 17:48:50 2018
New Revision: 333147
URL: https://svnweb.freebsd.org/changeset/base/333147
Log:
Add and fix comments for cam_periph_runccb()
Sponsored by: Netflix
Modified:
head/sys/cam/cam_periph.c
Modified: head/sys/cam/cam_periph.c
==============================================================================
--- head/sys/cam/cam_periph.c Tue May 1 17:39:20 2018 (r333146)
+++ head/sys/cam/cam_periph.c Tue May 1 17:48:50 2018 (r333147)
@@ -1148,6 +1148,10 @@ cam_periph_ccbwait(union ccb *ccb)
ccb->ccb_h.status, ccb->ccb_h.pinfo.index));
}
+/*
+ * Dispatch a CCB and wait for it to complete. If the CCB has set a
+ * callback function (ccb->ccb_h.cbfcnp), it will be overwritten and lost.
+ */
int
cam_periph_runccb(union ccb *ccb,
int (*error_routine)(union ccb *ccb,
@@ -1201,9 +1205,9 @@ cam_periph_runccb(union ccb *ccb,
/*
* If we're polling, then we need to ensure that we have ample resources
- * in the periph.
- * cam_periph_error can reschedule the ccb by calling xpt_action and
returning
- * ERESTART, so we have to effect the polling in the do loop below.
+ * in the periph. cam_periph_error can reschedule the ccb by calling
+ * xpt_action and returning ERESTART, so we have to effect the polling
+ * in the do loop below.
*/
if (must_poll) {
timeout = xpt_poll_setup(ccb);
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