diff options
| -rw-r--r-- | drivers/video/fbdev/vesafb.c | 62 |
1 files changed, 16 insertions, 46 deletions
diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c index d79a0ac49fc7..191156bdf638 100644 --- a/drivers/video/fbdev/vesafb.c +++ b/drivers/video/fbdev/vesafb.c @@ -404,60 +404,30 @@ static int vesafb_probe(struct platform_device *dev) * region already (FIXME) */ request_region(0x3c0, 32, "vesafb"); + if (mtrr == 3) { #ifdef CONFIG_MTRR - if (mtrr) { unsigned int temp_size = size_total; - unsigned int type = 0; + int rc; - switch (mtrr) { - case 1: - type = MTRR_TYPE_UNCACHABLE; - break; - case 2: - type = MTRR_TYPE_WRBACK; - break; - case 3: - type = MTRR_TYPE_WRCOMB; - break; - case 4: - type = MTRR_TYPE_WRTHROUGH; - break; - default: - type = 0; - break; - } - - if (type) { - int rc; - - /* Find the largest power-of-two */ - temp_size = roundup_pow_of_two(temp_size); + /* Find the largest power-of-two */ + temp_size = roundup_pow_of_two(temp_size); - /* Try and find a power of two to add */ - do { - rc = mtrr_add(vesafb_fix.smem_start, temp_size, - type, 1); - temp_size >>= 1; - } while (temp_size >= PAGE_SIZE && rc == -EINVAL); - } - } + /* Try and find a power of two to add */ + do { + rc = mtrr_add(vesafb_fix.smem_start, temp_size, + MTRR_TYPE_WRCOMB, 1); + temp_size >>= 1; + } while (temp_size >= PAGE_SIZE && rc == -EINVAL); #endif - - switch (mtrr) { - case 1: /* uncachable */ - info->screen_base = ioremap_nocache(vesafb_fix.smem_start, vesafb_fix.smem_len); - break; - case 2: /* write-back */ - info->screen_base = ioremap_cache(vesafb_fix.smem_start, vesafb_fix.smem_len); - break; - case 3: /* write-combining */ info->screen_base = ioremap_wc(vesafb_fix.smem_start, vesafb_fix.smem_len); - break; - case 4: /* write-through */ - default: + } else { +#ifdef CONFIG_MTRR + if (mtrr && mtrr != 3) + WARN_ONCE(1, "Only MTRR_TYPE_WRCOMB (3) make sense\n"); +#endif info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len); - break; } + if (!info->screen_base) { printk(KERN_ERR "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", |