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niu: Fix to check for dma mapping errors.
author
Shuah Khan
<shuah.khan@hp.com>
Fri, 20 Jul 2012 11:50:35 +0000
(11:50 +0000)
committer
David S. Miller
<davem@davemloft.net>
Mon, 23 Jul 2012 06:31:06 +0000
(23:31 -0700)
Fix Neptune ethernet driver to check dma mapping error after map_page()
interface returns.
Signed-off-by: Shuah Khan <shuah.khan@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/sun/niu.c
patch
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diff --git
a/drivers/net/ethernet/sun/niu.c
b/drivers/net/ethernet/sun/niu.c
index
8c726b7
..
60d5c03
100644
(file)
--- a/
drivers/net/ethernet/sun/niu.c
+++ b/
drivers/net/ethernet/sun/niu.c
@@
-3335,6
+3335,10
@@
static int niu_rbr_add_page(struct niu *np, struct rx_ring_info *rp,
addr = np->ops->map_page(np->device, page, 0,
PAGE_SIZE, DMA_FROM_DEVICE);
+ if (!addr) {
+ __free_page(page);
+ return -ENOMEM;
+ }
niu_hash_page(rp, page, addr);
if (rp->rbr_blocks_per_page > 1)