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drm/radeon/kms/atom: use get_unaligned_le32() for ctx->ps

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Noticed on a DEC Alpha.

Start up into console mode caused 15 unaligned accesses, and starting X
caused another 48.

Signed-off-by: Matt Turner <mattst88@gmail.com>
CC: Jerome Glisse <jglisse@redhat.com>
CC: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Matt Turner 2010-02-13 20:20:19 -05:00 committed by Dave Airlie
parent e22238ea37
commit ce36f00d59
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/radeon/atom.c
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@ -24,6 +24,7 @@
#include <linux/module.h>
#include <linux/sched.h>
#include <asm/unaligned.h>
#define ATOM_DEBUG
@ -212,7 +213,9 @@ static uint32_t atom_get_src_int(atom_exec_context *ctx, uint8_t attr,
case ATOM_ARG_PS:
idx = U8(*ptr);
(*ptr)++;
val = le32_to_cpu(ctx->ps[idx]);
/* get_unaligned_le32 avoids unaligned accesses from atombios
* tables, noticed on a DEC Alpha. */
val = get_unaligned_le32((u32 *)&ctx->ps[idx]);
if (print)
DEBUG("PS[0x%02X,0x%04X]", idx, val);
break;