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authorDave Jones <davej@redhat.com>2005-06-25 14:58:30 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:55 -0700
commitd7496cb75ec75b1e74283a481fb02f5d7ce7bdeb (patch)
treed716e849a363edd4a6a632e0acaaa31c164f83ea /drivers/video/vesafb.c
parent72414d3f1d22fc3e311b162fca95c430048d38ce (diff)
downloadlinux-d7496cb75ec75b1e74283a481fb02f5d7ce7bdeb.tar.bz2
[PATCH] Fix vesafb/mtrr scaling problem.
vesafb will do really silly things like.. mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining mtrr: type mismatch for e0000000,4000000 old: write-back new: write-combining mtrr: type mismatch for e0000000,2000000 old: write-back new: write-combining mtrr: type mismatch for e0000000,1000000 old: write-back new: write-combining mtrr: type mismatch for e0000000,800000 old: write-back new: write-combining mtrr: type mismatch for e0000000,400000 old: write-back new: write-combining mtrr: type mismatch for e0000000,200000 old: write-back new: write-combining mtrr: type mismatch for e0000000,100000 old: write-back new: write-combining mtrr: type mismatch for e0000000,80000 old: write-back new: write-combining mtrr: type mismatch for e0000000,40000 old: write-back new: write-combining mtrr: type mismatch for e0000000,20000 old: write-back new: write-combining mtrr: type mismatch for e0000000,10000 old: write-back new: write-combining mtrr: type mismatch for e0000000,8000 old: write-back new: write-combining mtrr: type mismatch for e0000000,4000 old: write-back new: write-combining mtrr: type mismatch for e0000000,2000 old: write-back new: write-combining mtrr: type mismatch for e0000000,1000 old: write-back new: write-combining mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x800 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x400 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x200 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x100 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x80 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x40 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x20 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x10 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x8 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x4 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x2 base: 0xe0000000 mtrr: size and base must be multiples of 4 kiB mtrr: size: 0x1 base: 0xe0000000 Stop scaling down at PAGE_SIZE. Also fix up some broken indentation. Signed-off-by: Dave Jones <davej@redhat.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/vesafb.c')
-rw-r--r--drivers/video/vesafb.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
index f3069b01e248..9ed1a931dd31 100644
--- a/drivers/video/vesafb.c
+++ b/drivers/video/vesafb.c
@@ -389,10 +389,11 @@ static int __init vesafb_probe(struct device *device)
unsigned int temp_size = size_total;
/* Find the largest power-of-two */
while (temp_size & (temp_size - 1))
- temp_size &= (temp_size - 1);
-
- /* Try and find a power of two to add */
- while (temp_size && mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) {
+ temp_size &= (temp_size - 1);
+
+ /* Try and find a power of two to add */
+ while (temp_size > PAGE_SIZE &&
+ mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) {
temp_size >>= 1;
}
}