Alessandro, please test this patch and report back if it fixes your problem.
---------- Forwarded Message ----------
Subject: Fix vesafb/mtrr scaling problem.
Date: Wednesday 22 June 2005 03:03
From: Dave Jones <[email protected]>
To: [email protected]
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 <[email protected]>
--- linux-2.6.12/drivers/video/vesafb.c~ 2005-06-21 18:55:59.000000000 -0400
+++ linux-2.6.12/drivers/video/vesafb.c 2005-06-21 18:57:26.000000000 -0400
@@ -389,10 +389,11 @@ static int __init vesafb_probe(struct de
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;
}
}
-
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