Module Name: src
Committed By: jmcneill
Date: Sun Jun 17 13:12:25 UTC 2018
Modified Files:
src/sys/dev/ic: dwc_gmac.c
Log Message:
Avoid calling bus_dmamap_sync with len=0
To generate a diff of this commit:
cvs rdiff -u -r1.46 -r1.47 src/sys/dev/ic/dwc_gmac.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/ic/dwc_gmac.c
diff -u src/sys/dev/ic/dwc_gmac.c:1.46 src/sys/dev/ic/dwc_gmac.c:1.47
--- src/sys/dev/ic/dwc_gmac.c:1.46 Sat Jun 16 00:15:00 2018
+++ src/sys/dev/ic/dwc_gmac.c Sun Jun 17 13:12:25 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: dwc_gmac.c,v 1.46 2018/06/16 00:15:00 jmcneill Exp $ */
+/* $NetBSD: dwc_gmac.c,v 1.47 2018/06/17 13:12:25 jmcneill Exp $ */
/*-
* Copyright (c) 2013, 2014 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: dwc_gmac.c,v 1.46 2018/06/16 00:15:00 jmcneill Exp $");
+__KERNEL_RCSID(1, "$NetBSD: dwc_gmac.c,v 1.47 2018/06/17 13:12:25 jmcneill Exp $");
/* #define DWC_GMAC_DEBUG 1 */
@@ -635,11 +635,13 @@ dwc_gmac_txdesc_sync(struct dwc_gmac_sof
TX_DESC_OFFSET(start),
TX_DESC_OFFSET(AWGE_TX_RING_COUNT)-TX_DESC_OFFSET(start),
ops);
- /* sync from start of ring to 'end' */
- bus_dmamap_sync(sc->sc_dmat, sc->sc_dma_ring_map,
- TX_DESC_OFFSET(0),
- TX_DESC_OFFSET(end)-TX_DESC_OFFSET(0),
- ops);
+ if (TX_DESC_OFFSET(end) - TX_DESC_OFFSET(0) > 0) {
+ /* sync from start of ring to 'end' */
+ bus_dmamap_sync(sc->sc_dmat, sc->sc_dma_ring_map,
+ TX_DESC_OFFSET(0),
+ TX_DESC_OFFSET(end)-TX_DESC_OFFSET(0),
+ ops);
+ }
}
static void
