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Subject[PATCH RFT RESEND] net: Fix Neptune ethernet driver to check dma mapping error
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Date
Fix Neptune ethernet driver to check dma mapping error after map_page()
interface returns.

Signed-off-by: Shuah Khan <shuah.khan@hp.com>
---
drivers/net/ethernet/sun/niu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index 8c726b7..60d5c03 100644
--- 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)
--
1.7.9.5




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