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authorSylvain \\\"ythier\\\" Hitier <sylvain.hitier@gmail.com>2014-10-07 13:40:34 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-10-15 12:29:23 +0200
commitf823cda9b841d142930e3de51dfda6cd245a2f83 (patch)
treed4c4ad8be4f0203a1453db4fdf9106c6d80677c9
parent404db05025f2fb873b0569a99cf541519fec607f (diff)
downloadlinux-f823cda9b841d142930e3de51dfda6cd245a2f83.tar.gz
3c59x: fix bad split of cpu_to_le32(pci_map_single())
[ Upstream commit 88b09a6d958af6c458acf055ee2eb5bc9564efda ] In commit 6f2b6a3005b2c34c39f207a87667564f64f2f91a, # 3c59x: Add dma error checking and recovery the intent is to split out the mapping from the byte-swapping in order to insert a dma_mapping_error() check. Kinda this semantic patch: // See http://coccinelle.lip6.fr/ // // Beware, grouik-and-dirty! @@ expression DEV, X, Y, Z; @@ - cpu_to_le32(pci_map_single(DEV, X, Y, Z)) + dma_addr_t addr = pci_map_single(DEV, X, Y, Z); + if (dma_mapping_error(&DEV->dev, addr)) + /* snip */; + cpu_to_le32(addr) However, the #else part (of the #if DO_ZEROCOPY test) is changed this way: - cpu_to_le32(pci_map_single(DEV, X, Y, Z)) + dma_addr_t addr = cpu_to_le32(pci_map_single(DEV, X, Y, Z)); // ^^^^^^^^^^^ // That mismatches the 3 other changes! + if (dma_mapping_error(&DEV->dev, addr)) + /* snip */; + cpu_to_le32(addr) Let's remove the leftover cpu_to_le32() for coherency. v2: Better changelog. v3: Add Acked-by Fixes: 6f2b6a3005b2c34c39f207a87667564f64f2f91a # 3c59x: Add dma error checking and recovery Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Sylvain "ythier" Hitier <sylvain.hitier@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/net/ethernet/3com/3c59x.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c
index 8ca49f04acec..0a3108b3c267 100644
--- a/drivers/net/ethernet/3com/3c59x.c
+++ b/drivers/net/ethernet/3com/3c59x.c
@@ -2214,7 +2214,7 @@ boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev)
}
}
#else
- dma_addr = cpu_to_le32(pci_map_single(VORTEX_PCI(vp), skb->data, skb->len, PCI_DMA_TODEVICE));
+ dma_addr = pci_map_single(VORTEX_PCI(vp), skb->data, skb->len, PCI_DMA_TODEVICE);
if (dma_mapping_error(&VORTEX_PCI(vp)->dev, dma_addr))
goto out_dma_err;
vp->tx_ring[entry].addr = cpu_to_le32(dma_addr);