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b43legacy: Fix possible NULL pointer dereference in DMA code 

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>
This commit is contained in:
Michael Buesch 2008-06-20 11:40:46 +02:00 committed by John W. Linville
parent 7b3abfc87e
commit 2f9ec47d09
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/b43legacy/dma.c
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@ -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;