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| author | Ondrej Zary <linux@rainbow-software.org> | 2010-08-19 23:13:25 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-20 18:34:54 +0200 |
| commit | c81476df1b4241aefba4ff83a7701b3a926bd7ce (patch) | |
| tree | ada3e578b5bf65302cdabc7fd101e9b60c71440d | |
| parent | Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/ker... (diff) | |
| download | linux-c81476df1b4241aefba4ff83a7701b3a926bd7ce.tar.xz linux-c81476df1b4241aefba4ff83a7701b3a926bd7ce.zip | |
matroxfb: fix incorrect use of memcpy_toio()
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>
Cc: <stable@kernel.org> [2.6.34.x, 2.6.35.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -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 f3a4e15672d9..f96a471cb1a8 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; |