From: Ivan Vecera Date: Wed, 15 Jan 2014 10:11:34 +0000 (+0100) Subject: be2net: add dma_mapping_error() check for dma_map_page() X-Git-Tag: firefly_0821_release~176^2~4665^2~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ba42fad0964a41f0830e80c1b6be49c1e6bfcc01;p=firefly-linux-kernel-4.4.55.git be2net: add dma_mapping_error() check for dma_map_page() The driver does not check value returned by dma_map_page. The patch fixes this. v2: Removed the bugfix for non-bug ;-) (thanks Sathya) Signed-off-by: Ivan Vecera Acked-by: Sathya Perla Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index bf40fdaecfa3..a37039d353c5 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -1776,6 +1776,7 @@ static void be_post_rx_frags(struct be_rx_obj *rxo, gfp_t gfp) struct be_rx_page_info *page_info = NULL, *prev_page_info = NULL; struct be_queue_info *rxq = &rxo->q; struct page *pagep = NULL; + struct device *dev = &adapter->pdev->dev; struct be_eth_rx_d *rxd; u64 page_dmaaddr = 0, frag_dmaaddr; u32 posted, page_offset = 0; @@ -1788,9 +1789,15 @@ static void be_post_rx_frags(struct be_rx_obj *rxo, gfp_t gfp) rx_stats(rxo)->rx_post_fail++; break; } - page_dmaaddr = dma_map_page(&adapter->pdev->dev, pagep, - 0, adapter->big_page_size, + page_dmaaddr = dma_map_page(dev, pagep, 0, + adapter->big_page_size, DMA_FROM_DEVICE); + if (dma_mapping_error(dev, page_dmaaddr)) { + put_page(pagep); + pagep = NULL; + rx_stats(rxo)->rx_post_fail++; + break; + } page_info->page_offset = 0; } else { get_page(pagep);