[PATCH libdrm] xf86drm: open correct render node on non-linux

[Jonathan Gray]

drm render nodes have the same major as drm primary devices but offset
the minor by a base of 128.

I expected the name of the device to have numbering starting at 0 when
these non-linux codepaths were added (before OpenBSD had render nodes).

Signed-off-by: Jonathan Gray <jsg at jsg.id.au>
---
 xf86drm.c | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/xf86drm.c b/xf86drm.c
index 42022cac..0763fd26 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -2931,7 +2931,7 @@ static char *drmGetMinorNameForFD(int fd, int type)
     char buf[PATH_MAX + 1];
     const char *dev_name;
     unsigned int maj, min;
-    int n, base;
+    int n;
 
     if (fstat(fd, &sbuf))
         return NULL;
@@ -2956,11 +2956,7 @@ static char *drmGetMinorNameForFD(int fd, int type)
         return NULL;
     };
 
-    base = drmGetMinorBase(type);
-    if (base < 0)
-        return NULL;
-
-    n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min - base);
+    n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min);
     if (n == -1 || n >= sizeof(buf))
         return NULL;
 
@@ -3854,7 +3850,7 @@ drm_public int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
     char             node[PATH_MAX + 1];
     const char      *dev_name;
     int              node_type, subsystem_type;
-    int              maj, min, n, ret, base;
+    int              maj, min, n, ret;
 
     if (fd == -1 || device == NULL)
         return -EINVAL;
@@ -3886,11 +3882,7 @@ drm_public int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
         return -EINVAL;
     };
 
-    base = drmGetMinorBase(node_type);
-    if (base < 0)
-        return -EINVAL;
-
-    n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min - base);
+    n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min);
     if (n == -1 || n >= PATH_MAX)
       return -errno;
     if (stat(node, &sbuf))
@@ -4110,7 +4102,7 @@ drm_public char *drmGetDeviceNameFromFd2(int fd)
     char             node[PATH_MAX + 1];
     const char      *dev_name;
     int              node_type;
-    int              maj, min, n, base;
+    int              maj, min, n;
 
     if (fstat(fd, &sbuf))
         return NULL;
@@ -4139,11 +4131,7 @@ drm_public char *drmGetDeviceNameFromFd2(int fd)
         return NULL;
     };
 
-    base = drmGetMinorBase(node_type);
-    if (base < 0)
-        return NULL;
-
-    n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min - base);
+    n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min);
     if (n == -1 || n >= PATH_MAX)
       return NULL;
 
-- 
2.21.0