[patch] workaround patch

paste_1139834 (text/plain), 1.04 KB, created by Matt Turner on 2020-04-12 06:34:12 UTC

From 471d63ac170e2a2c6dcfb3656aa7d1e9a4b2029c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <[e-mail]>
Date: Sun, 12 Apr 2020 00:08:52 +0300
Subject: [PATCH] fix realpath vs. firefox

---
 xf86drm.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/xf86drm.c b/xf86drm.c
index d240f95b6d08..76e415c72de4 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -3011,9 +3011,11 @@ static int drmParseSubsystemType(int maj, int 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);
-
-    subsystem_type = get_subsystem_type(path);
+    subsystem_type = get_subsystem_type(real_path);
+    if (subsystem_type >= 0)
+        memcpy(path, real_path, sizeof(path));
+    else
+        subsystem_type = get_subsystem_type(path);
     if (subsystem_type == DRM_BUS_VIRTIO) {
         strncat(path, "/..", PATH_MAX);
         subsystem_type = get_subsystem_type(path);
-- 
2.24.1