b43: allocate receive buffers big enough for max frame len + offset

Otherwise, skb_put inside of dma_rx can fail...

	https://bugzilla.kernel.org/show_bug.cgi?id=32042

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: stable@kernel.org

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 3d5566e7af0a..ff0f5ba14b2c 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -1536,7 +1536,7 @@ static void dma_rx(struct b43_dmaring *ring, int *slot)
                 dmaaddr = meta->dmaaddr;
                 goto drop_recycle_buffer;
         }
-        if (unlikely(len > ring->rx_buffersize)) {
+        if (unlikely(len + ring->frameoffset > ring->rx_buffersize)) {
                 /* The data did not fit into one descriptor buffer
                  * and is split over multiple buffers.
                  * This should never happen, as we try to allocate buffers
diff --git a/drivers/net/wireless/b43/dma.h b/drivers/net/wireless/b43/dma.h
index a01c2100f166..e8a80a1251bf 100644
--- a/drivers/net/wireless/b43/dma.h
+++ b/drivers/net/wireless/b43/dma.h
@@ -163,7 +163,7 @@ struct b43_dmadesc_generic {
 /* DMA engine tuning knobs */
 #define B43_TXRING_SLOTS                256
 #define B43_RXRING_SLOTS                64
-#define B43_DMA0_RX_BUFFERSIZE          IEEE80211_MAX_FRAME_LEN
+#define B43_DMA0_RX_BUFFERSIZE          (B43_DMA0_RX_FRAMEOFFSET + IEEE80211_MAX_FRAME_LEN)
 
 /* Pointer poison */
 #define B43_DMA_PTR_POISON              ((void *)ERR_PTR(-ENOMEM))