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authorFlorian Fainelli <f.fainelli@gmail.com>2017-08-24 16:01:13 -0700
committerDavid S. Miller <davem@davemloft.net>2017-08-24 18:23:21 -0700
commitc2062ee3d9615828109ffe8089fbf69bed394d05 (patch)
treea9caed4a4de4a9c9f238fd6ab03c572c92807ea1 /drivers/net/ethernet/broadcom/bcmsysport.c
parentd4fec855905fa8bd5fb1c59f73ad2d74a944876a (diff)
downloadlinux-c2062ee3d9615828109ffe8089fbf69bed394d05.tar.bz2
net: systemport: Free DMA coherent descriptors on errors
In case bcm_sysport_init_tx_ring() is not able to allocate ring->cbs, we would return with an error, and call bcm_sysport_fini_tx_ring() and it would see that ring->cbs is NULL and do nothing. This would leak the coherent DMA descriptor area, so we need to free it on error before returning. Reported-by: Eric Dumazet <edumazet@gmail.com> Fixes: 80105befdb4b ("net: systemport: add Broadcom SYSTEMPORT Ethernet MAC driver") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bcmsysport.c')
-rw-r--r--drivers/net/ethernet/broadcom/bcmsysport.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index e6add99cc31c..c28fa5a8734c 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -1346,6 +1346,8 @@ static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
if (!ring->cbs) {
+ dma_free_coherent(kdev, sizeof(struct dma_desc),
+ ring->desc_cpu, ring->desc_dma);
netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
return -ENOMEM;
}