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mach64: use unaligned access

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commit c29dd8696d upstream.

This patch fixes mach64 to use unaligned access to the font bitmap.

This fixes unaligned access warning on sparc64 when 14x8 font is loaded.

On x86(64), unaligned access is handled in hardware, so both functions
le32_to_cpup and get_unaligned_le32 perform the same operation.

On RISC machines, unaligned access is not handled in hardware, so we
better use get_unaligned_le32 to avoid the unaligned trap and warning.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mikulas Patocka 2014-01-23 14:41:09 -05:00 committed by Greg Kroah-Hartman
parent 7ea3044291
commit caf6f52449
1 changed files with 2 additions and 1 deletions
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3
drivers/video/aty/mach64_accel.c
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@ -4,6 +4,7 @@
*/
#include <linux/delay.h>
#include <asm/unaligned.h>
#include <linux/fb.h>
#include <video/mach64.h>
#include "atyfb.h"
@ -419,7 +420,7 @@ void atyfb_imageblit(struct fb_info *info, const struct fb_image *image)
u32 *pbitmap, dwords = (src_bytes + 3) / 4;
for (pbitmap = (u32*)(image->data); dwords; dwords--, pbitmap++) {
wait_for_fifo(1, par);
aty_st_le32(HOST_DATA0, le32_to_cpup(pbitmap), par);
aty_st_le32(HOST_DATA0, get_unaligned_le32(pbitmap), par);
}
}