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drm/radeon/kms: don't read attempt to read bios from VRAM on unposted GPU.

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Since the VGA switcheroo, we'd attempt to read the BIOS from VRAM on startup
but on some unposted cards this can cause hangs/crashes.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=28592

(further problem pointed out by agd5f on IGP systems)

Reported-by: Reilithion on #radeon
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2010-06-21 13:31:38 +10:00
parent f96b35cd6f
commit 8b5d8dec7c
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/radeon/radeon_bios.c
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@ -48,6 +48,10 @@ static bool igp_read_bios_from_vram(struct radeon_device *rdev)
resource_size_t vram_base;
resource_size_t size = 256 * 1024; /* ??? */
if (!(rdev->flags & RADEON_IS_IGP))
if (!radeon_card_posted(rdev))
return false;
rdev->bios = NULL;
vram_base = drm_get_resource_start(rdev->ddev, 0);
bios = ioremap(vram_base, size);