Currently the code assumes that a virtio based device is always located
on the PCI bus.
Modify the parser to make it check the device's parent directory to
determine on which bus it is located.
Output for virtio-pci is the PCI bus.
Output for virtio-mmio is the Platform bus.
Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com>
Signed-off-by: Mikhail Golubev <Mikhail.Golubev@opensynergy.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
{
#ifdef __linux__
char path[PATH_MAX + 1] = "";
{
#ifdef __linux__
char path[PATH_MAX + 1] = "";
+ char real_path[PATH_MAX + 1] = "";
+ int subsystem_type;
- snprintf(path, PATH_MAX, "/sys/dev/char/%d:%d/device", maj, min);
+ 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);
- return get_subsystem_type(path);
+ subsystem_type = get_subsystem_type(path);
+ if (subsystem_type == DRM_BUS_VIRTIO) {
+ strncat(path, "/..", PATH_MAX);
+ subsystem_type = get_subsystem_type(path);
+ }
+ return subsystem_type;
#elif defined(__OpenBSD__) || defined(__DragonFly__)
return DRM_BUS_PCI;
#else
#elif defined(__OpenBSD__) || defined(__DragonFly__)
return DRM_BUS_PCI;
#else
switch (subsystem_type) {
case DRM_BUS_PCI:
switch (subsystem_type) {
case DRM_BUS_PCI:
return drmProcessPciDevice(device, node, node_type, maj, min,
fetch_deviceinfo, flags);
case DRM_BUS_USB:
return drmProcessPciDevice(device, node, node_type, maj, min,
fetch_deviceinfo, flags);
case DRM_BUS_USB: