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| author | Dean Nelson <dcn@sgi.com> | 2006-08-08 22:03:29 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-08-08 22:28:52 +0200 |
| commit | 7682a4c624e0011b5f3e8dd3021dc54961260d97 (patch) | |
| tree | f57ecd8f805a4df701812d3f7456da48bcdf63ac /kernel/configs.c | |
| parent | Linux v2.6.18-rc4 (diff) | |
| download | linux-7682a4c624e0011b5f3e8dd3021dc54961260d97.tar.xz linux-7682a4c624e0011b5f3e8dd3021dc54961260d97.zip | |
[IA64-SGI] Silent data corruption caused by XPC V2.
Jack Steiner identified a problem where XPC can cause a silent
data corruption. On module load, the placement may cause the
xpc_remote_copy_buffer to span two physical pages. DMA transfers are
done to the start virtual address translated to physical.
This patch changes the buffer from a statically allocated buffer to a
kmalloc'd buffer. Dean Nelson reviewed this before posting. I have
tested it in the configuration that was showing the memory corruption
and verified it works. I also added a BUG_ON statement to help catch
this if a similar situation is encountered.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'kernel/configs.c')
0 files changed, 0 insertions, 0 deletions