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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-03-10 19:49:22 +0100
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-03-10 19:53:54 +0100
commit45033a900fb0d004b9790f7b9d57045ea7510cd3 (patch)
treeb2e56cc633c39dd17babc79d58ec50883583f0fe /src/mediactl.c
parent87f58c2ed885d636229f7209fde883058433a1ce (diff)
Read errno before media_dbg calls
The media_dbg() in error paths can modify the errno value, leading to the wrong error (or no error at all) being returned. Fix this by reading the errno value before calling media_dbg(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/mediactl.c')
-rw-r--r--src/mediactl.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/mediactl.c b/src/mediactl.c
index 57cf86b..7b18ca7 100644
--- a/src/mediactl.c
+++ b/src/mediactl.c
@@ -140,9 +140,10 @@ int media_setup_link(struct media_device *media,
ret = ioctl(media->fd, MEDIA_IOC_SETUP_LINK, &ulink);
if (ret == -1) {
+ ret = -errno;
media_dbg(media, "%s: Unable to setup link (%s)\n",
__func__, strerror(errno));
- return -errno;
+ return ret;
}
link->flags = ulink.flags;
@@ -211,12 +212,13 @@ static int media_enum_links(struct media_device *media)
links.links = calloc(entity->info.links, sizeof(struct media_link_desc));
if (ioctl(media->fd, MEDIA_IOC_ENUM_LINKS, &links) < 0) {
+ ret = -errno;
media_dbg(media,
"%s: Unable to enumerate pads and links (%s).\n",
__func__, strerror(errno));
free(links.pads);
free(links.links);
- return -errno;
+ return ret;
}
for (i = 0; i < entity->info.pads; ++i) {