From 997edcd37ff0a8c26cc9514f6a376b10f721892e Mon Sep 17 00:00:00 2001
From: Eleni Maria Stea <elene.mst@gmail.com>
Date: Mon, 22 Nov 2021 12:14:36 +0200
Subject: [PATCH] xf86drm: fix compiler warnings

Used casting to fix warnings about assigning different enum types to
variables. Used error checks in places where snprintf is called and
output might be truncated to fix gcc format-truncation warnings.

v2: Removed a change in drm.h (Simon Ser)
v3, v4: Removed unecessary braces in snprintf (Simon Ser)

Signed-off-by: Eleni Maria Stea <elene.mst@gmail.com>
---
 xf86drm.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/xf86drm.c b/xf86drm.c
index 17ff2882..5933e4bc 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -1559,8 +1559,8 @@ drm_public int drmAddMap(int fd, drm_handle_t offset, drmSize size, drmMapType t
     memclear(map);
     map.offset  = offset;
     map.size    = size;
-    map.type    = type;
-    map.flags   = flags;
+    map.type    = (enum drm_map_type)type;
+    map.flags   = (enum drm_map_flags)flags;
     if (drmIoctl(fd, DRM_IOCTL_ADD_MAP, &map))
         return -errno;
     if (handle)
@@ -1604,7 +1604,7 @@ drm_public int drmAddBufs(int fd, int count, int size, drmBufDescFlags flags,
     memclear(request);
     request.count     = count;
     request.size      = size;
-    request.flags     = flags;
+    request.flags     = (int)flags;
     request.agp_start = agp_offset;
 
     if (drmIoctl(fd, DRM_IOCTL_ADD_BUFS, &request))
@@ -1888,7 +1888,7 @@ drm_public int drmDMA(int fd, drmDMAReqPtr request)
     dma.send_count      = request->send_count;
     dma.send_indices    = request->send_list;
     dma.send_sizes      = request->send_sizes;
-    dma.flags           = request->flags;
+    dma.flags           = (enum drm_dma_flags)request->flags;
     dma.request_count   = request->request_count;
     dma.request_size    = request->request_size;
     dma.request_indices = request->request_list;
@@ -2825,8 +2825,8 @@ drm_public int drmGetMap(int fd, int idx, drm_handle_t *offset, drmSize *size,
         return -errno;
     *offset = map.offset;
     *size   = map.size;
-    *type   = map.type;
-    *flags  = map.flags;
+    *type   = (drmMapType)map.type;
+    *flags  = (drmMapFlags)map.flags;
     *handle = (unsigned long)map.handle;
     *mtrr   = map.mtrr;
     return 0;
@@ -3377,8 +3377,9 @@ static char *drmGetMinorNameForFD(int fd, int type)
 
     while ((ent = readdir(sysdir))) {
         if (strncmp(ent->d_name, name, len) == 0) {
-            snprintf(dev_name, sizeof(dev_name), DRM_DIR_NAME "/%s",
-                 ent->d_name);
+            if (snprintf(dev_name, sizeof(dev_name), DRM_DIR_NAME "/%s",
+                        ent->d_name) < 0)
+                return NULL;
 
             closedir(sysdir);
             return strdup(dev_name);
@@ -3789,7 +3790,9 @@ static int parse_separate_sysfs_files(int maj, int min,
     get_pci_path(maj, min, pci_path);
 
     for (unsigned i = ignore_revision ? 1 : 0; i < ARRAY_SIZE(attrs); i++) {
-        snprintf(path, PATH_MAX, "%s/%s", pci_path, attrs[i]);
+        if (snprintf(path, PATH_MAX, "%s/%s", pci_path, attrs[i]) < 0)
+            return -errno;
+
         fp = fopen(path, "r");
         if (!fp)
             return -errno;
@@ -3819,7 +3822,9 @@ static int parse_config_sysfs_file(int maj, int min,
 
     get_pci_path(maj, min, pci_path);
 
-    snprintf(path, PATH_MAX, "%s/config", pci_path);
+    if (snprintf(path, PATH_MAX, "%s/config", pci_path) < 0)
+        return -errno;
+
     fd = open(path, O_RDONLY);
     if (fd < 0)
         return -errno;