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authorTomas Winkler <tomas.winkler@intel.com>2016-01-07 15:46:38 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-01-08 04:03:43 +0300
commited6dc538e5a36a331b6256d54f435c80f6715460 (patch)
tree00da8479bf04907e2d3639aa5ac3faac5e35fd78 /drivers/misc
parente0a7f1f04cd9bb13df7503ba7156ff0a37c9f460 (diff)
downloadlinux-ed6dc538e5a36a331b6256d54f435c80f6715460.tar.xz
mei: fix fasync return value on error
fasync should return a negative value on error and not poll mask POLLERR. Cc: <stable@vger.kernel.org> # 4.3+ Cc: Al Viro <viro@ZenIV.linux.org.uk> Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/main.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index b2f2486b3d75..677d0362f334 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -657,7 +657,9 @@ out:
* @file: pointer to file structure
* @band: band bitmap
*
- * Return: poll mask
+ * Return: negative on error,
+ * 0 if it did no changes,
+ * and positive a process was added or deleted
*/
static int mei_fasync(int fd, struct file *file, int band)
{
@@ -665,7 +667,7 @@ static int mei_fasync(int fd, struct file *file, int band)
struct mei_cl *cl = file->private_data;
if (!mei_cl_is_connected(cl))
- return POLLERR;
+ return -ENODEV;
return fasync_helper(fd, file, band, &cl->ev_async);
}