From 8b5d8dec7c85b6f1a4ae9c57500f1378d79556bc Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Mon, 21 Jun 2010 13:31:38 +1000 Subject: [PATCH] drm/radeon/kms: don't read attempt to read bios from VRAM on unposted GPU. 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 --- drivers/gpu/drm/radeon/radeon_bios.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c index fbba938f8048..2c9213739999 100644 --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -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);