43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
Only check for for relative path on virtio devices. Otherwise it could
|
|
break driver loading in some circumstances, notably the IceCat sandbox.
|
|
|
|
https://gitlab.freedesktop.org/mesa/drm/-/issues/39
|
|
|
|
Taken from upstream:
|
|
https://gitlab.freedesktop.org/mesa/drm/-/commit/57df07572ce45a1b60bae6fb89770388d3abd6dd
|
|
|
|
diff --git a/xf86drm.c b/xf86drm.c
|
|
--- a/xf86drm.c
|
|
+++ b/xf86drm.c
|
|
@@ -3103,15 +3103,18 @@ static int drmParseSubsystemType(int maj, int min)
|
|
int subsystem_type;
|
|
|
|
snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device", maj, min);
|
|
- if (!realpath(path, real_path))
|
|
- return -errno;
|
|
- snprintf(path, sizeof(path), "%s", real_path);
|
|
|
|
subsystem_type = get_subsystem_type(path);
|
|
+ /* Try to get the parent (underlying) device type */
|
|
if (subsystem_type == DRM_BUS_VIRTIO) {
|
|
+ /* Assume virtio-pci on error */
|
|
+ if (!realpath(path, real_path))
|
|
+ return DRM_BUS_VIRTIO;
|
|
strncat(path, "/..", PATH_MAX);
|
|
subsystem_type = get_subsystem_type(path);
|
|
- }
|
|
+ if (subsystem_type < 0)
|
|
+ return DRM_BUS_VIRTIO;
|
|
+ }
|
|
return subsystem_type;
|
|
#elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__FreeBSD__)
|
|
return DRM_BUS_PCI;
|
|
@@ -3920,6 +3923,7 @@ process_device(drmDevicePtr *device, const char *d_name,
|
|
|
|
switch (subsystem_type) {
|
|
case DRM_BUS_PCI:
|
|
+ case DRM_BUS_VIRTIO:
|
|
return drmProcessPciDevice(device, node, node_type, maj, min,
|
|
fetch_deviceinfo, flags);
|
|
case DRM_BUS_USB:
|