atl1: fix 4G memory corruption bug

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When using 4+ GB RAM and SWIOTLB is active, the driver corrupts
memory by writing an skb after the relevant DMA page has been
unmapped.  Although this doesn't happen when *not* using bounce
buffers, clearing the pointer to the DMA page after unmapping
it fixes the problem.

http://marc.info/?t=120861317000005&r=2&w=2

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

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Alexey Dobriyan 2008-05-23 02:00:25 +04:00 • committed by Jeff Garzik

parent 08722bc4a0

commit aefdbf1a3b

1 changed files with 1 additions and 0 deletions

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drivers/net/atlx/atl1.c

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