diff options
Diffstat (limited to 'drivers/net/wireless/p54/p54spi.c')
| -rw-r--r-- | drivers/net/wireless/p54/p54spi.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/net/wireless/p54/p54spi.c b/drivers/net/wireless/p54/p54spi.c index f8af0961018..52023127cf3 100644 --- a/drivers/net/wireless/p54/p54spi.c +++ b/drivers/net/wireless/p54/p54spi.c @@ -395,7 +395,12 @@ static int p54spi_rx(struct p54s_priv *priv) return 0; } - skb = dev_alloc_skb(len); + + /* Firmware may insert up to 4 padding bytes after the lmac header, + * but it does not amend the size of SPI data transfer. + * Such packets has correct data size in header, thus referencing + * past the end of allocated skb. Reserve extra 4 bytes for this case */ + skb = dev_alloc_skb(len + 4); if (!skb) { dev_err(&priv->spi->dev, "could not alloc skb"); return 0; @@ -403,6 +408,9 @@ static int p54spi_rx(struct p54s_priv *priv) p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, skb_put(skb, len), len); p54spi_sleep(priv); + /* Put additional bytes to compensate for the possible + * alignment-caused truncation */ + skb_put(skb, 4); if (p54_rx(priv->hw, skb) == 0) dev_kfree_skb(skb); |