loader: use drmGetDeviceNameFromFd2 from libdrm

Reduce code duplication and automatically benefit from OS-specific
fixes to libdrm (e.g. in FreeBSD ports).

API was introduced with 2.4.74 and we already require 2.4.75 globally.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103283
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

diff --git a/src/loader/loader.c b/src/loader/loader.c
index 182ba90a0da8c152b1791f9642384654bca66121..f7f85e37c2094f52175e052f04333a727ea6dd63 100644 (file)
--- a/src/loader/loader.c
+++ b/src/loader/loader.c
@@ -244,29 +244,6 @@ int loader_get_user_preferred_fd(int default_fd, bool *different_device)
 }
 #endif
 
-#if defined(HAVE_LIBDRM)
-static int
-dev_node_from_fd(int fd, unsigned int *maj, unsigned int *min)
-{
-   struct stat buf;
-
-   if (fstat(fd, &buf) < 0) {
-      log_(_LOADER_WARNING, "MESA-LOADER: failed to stat fd %d\n", fd);
-      return -1;
-   }
-
-   if (!S_ISCHR(buf.st_mode)) {
-      log_(_LOADER_WARNING, "MESA-LOADER: fd %d not a character device\n", fd);
-      return -1;
-   }
-
-   *maj = major(buf.st_rdev);
-   *min = minor(buf.st_rdev);
-
-   return 0;
-}
-#endif
-
 #if defined(HAVE_LIBDRM)
 
 static int
@@ -312,18 +289,7 @@ loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
 static char *
 drm_get_device_name_for_fd(int fd)
 {
-   unsigned int maj, min;
-   char buf[0x40];
-   int n;
-
-   if (dev_node_from_fd(fd, &maj, &min) < 0)
-      return NULL;
-
-   n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, min);
-   if (n == -1 || n >= sizeof(buf))
-      return NULL;
-
-   return strdup(buf);
+   return drmGetDeviceNameFromFd2(fd);
 }
 #endif