diff options
| author | Ondrej Zary <linux@rainbow-software.org> | 2010-08-19 14:13:25 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-26 16:43:32 -0700 |
| commit | d1061f306fff49025fe942d990b79d14c627d214 (patch) | |
| tree | 53d1622b276252eef41d10f4ae211d8db64c96c2 /drivers | |
| parent | ecc2af8b063e296848fa998ddeaa1e41359ed8e3 (diff) | |
matroxfb: fix incorrect use of memcpy_toio()
commit c81476df1b4241aefba4ff83a7701b3a926bd7ce upstream.
Screen is completely corrupted since 2.6.34. Bisection revealed that it's
caused by commit 6175ddf06b61720 ("x86: Clean up mem*io functions.").
H. Peter Anvin explained that memcpy_toio() does not copy data in 32bit
chunks anymore on x86.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/matrox/matroxfb_base.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/matrox/matroxfb_base.h b/drivers/video/matrox/matroxfb_base.h index f3a4e15672d..f96a471cb1a 100644 --- a/drivers/video/matrox/matroxfb_base.h +++ b/drivers/video/matrox/matroxfb_base.h @@ -151,13 +151,13 @@ static inline void mga_writel(vaddr_t va, unsigned int offs, u_int32_t value) { static inline void mga_memcpy_toio(vaddr_t va, const void* src, int len) { #if defined(__alpha__) || defined(__i386__) || defined(__x86_64__) /* - * memcpy_toio works for us if: + * iowrite32_rep works for us if: * (1) Copies data as 32bit quantities, not byte after byte, * (2) Performs LE ordered stores, and * (3) It copes with unaligned source (destination is guaranteed to be page * aligned and length is guaranteed to be multiple of 4). */ - memcpy_toio(va.vaddr, src, len); + iowrite32_rep(va.vaddr, src, len >> 2); #else u_int32_t __iomem* addr = va.vaddr; |