4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Tomas Winkler <[email protected]> commit ed6dc538e5a36a331b6256d54f435c80f6715460 upstream. fasync should return a negative value on error and not poll mask POLLERR. Cc: Al Viro <[email protected]> Reported-by: Al Viro <[email protected]> Signed-off-by: Tomas Winkler <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/misc/mei/main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- 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 fil 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); }
