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[src/trunk]: src/sys/dev/usb Ignore completed transfers when detaching. This ...
details: https://anonhg.NetBSD.org/src/rev/eb9ae8178c70
branches: trunk
changeset: 818168:eb9ae8178c70
user: mlelstv <mlelstv%NetBSD.org@localhost>
date: Sat Oct 01 11:09:12 2016 +0000
description:
Ignore completed transfers when detaching. This avoids a race condition
where the detach code has already freed the xfer structures.
diffstat:
sys/dev/usb/if_run.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diffs (28 lines):
diff -r a889895e7bbd -r eb9ae8178c70 sys/dev/usb/if_run.c
--- a/sys/dev/usb/if_run.c Sat Oct 01 11:07:30 2016 +0000
+++ b/sys/dev/usb/if_run.c Sat Oct 01 11:09:12 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_run.c,v 1.19 2016/10/01 11:07:30 mlelstv Exp $ */
+/* $NetBSD: if_run.c,v 1.20 2016/10/01 11:09:12 mlelstv Exp $ */
/* $OpenBSD: if_run.c,v 1.90 2012/03/24 15:11:04 jsg Exp $ */
/*-
@@ -23,7 +23,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_run.c,v 1.19 2016/10/01 11:07:30 mlelstv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_run.c,v 1.20 2016/10/01 11:09:12 mlelstv Exp $");
#include <sys/param.h>
#include <sys/sockio.h>
@@ -2335,6 +2335,9 @@
uint32_t dmalen;
int xferlen;
+ if (__predict_false(sc->sc_flags & RUN_DETACHING))
+ return;
+
if (__predict_false(status != USBD_NORMAL_COMPLETION)) {
DPRINTF(("RX status=%d\n", status));
if (status == USBD_STALLED)
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