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authorDave Airlie <airlied@linux.ie>2008-11-11 18:02:12 +1000
committerDave Airlie <airlied@linux.ie>2008-11-11 18:02:12 +1000
commitafa21e0584f78964c092981fad94e45d38cda249 (patch)
treee9902386afb4995ffcec006745c194a136813f0f /drivers/gpu/drm
parent78538bf14995a136c2d9a22159ada49937359119 (diff)
drm/i915: Filter pci devices based on PCI_CLASS_DISPLAY_VGA
This fixes hangs on 855-class hardware by avoiding double attachment of the driver due to the stub second head device having the same pci id as the real device. Other DRM drivers probably want this treatment as well, but I'm applying it just to this one for safety. But we should clean up the drm_pciids.h mess now so that each driver has its own pci id list header in its own directory. Lets do that in the next release. Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/drm_drv.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 96f416afc3f6..3ab1e9cc4692 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -266,11 +266,19 @@ int drm_init(struct drm_driver *driver)
for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
+ /* Loop around setting up a DRM device for each PCI device
+ * matching our ID and device class. If we had the internal
+ * function that pci_get_subsys and pci_get_class used, we'd
+ * be able to just pass pid in instead of doing a two-stage
+ * thing.
+ */
pdev = NULL;
- /* pass back in pdev to account for multiple identical cards */
while ((pdev =
pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
pid->subdevice, pdev)) != NULL) {
+ if ((pdev->class & pid->class_mask) != pid->class)
+ continue;
+
/* stealth mode requires a manual probe */
pci_dev_get(pdev);
drm_get_dev(pdev, pid, driver);