b43legacy: Fix possible NULL pointer dereference in DMA code
authorMichael Buesch <mb@bu3sch.de>
Fri, 20 Jun 2008 09:40:46 +0000 (11:40 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 25 Jun 2008 14:56:16 +0000 (10:56 -0400)
This fixes a possible NULL pointer dereference in an error path of the
DMA allocation error checking code. This is also necessary for a future
DMA API change that is on its way into the mainline kernel that adds
an additional dev parameter to dma_mapping_error().

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: stable <stable@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/b43legacy/dma.c

index c990f87..93ddc1c 100644 (file)
@@ -876,6 +876,7 @@ struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_wldev *dev,
        if (!ring)
                goto out;
        ring->type = type;
+       ring->dev = dev;
 
        nr_slots = B43legacy_RXRING_SLOTS;
        if (for_tx)
@@ -922,7 +923,6 @@ struct b43legacy_dmaring *b43legacy_setup_dmaring(struct b43legacy_wldev *dev,
                                 DMA_TO_DEVICE);
        }
 
-       ring->dev = dev;
        ring->nr_slots = nr_slots;
        ring->mmio_base = b43legacy_dmacontroller_base(type, controller_index);
        ring->index = controller_index;