diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2020-01-10 15:32:51 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2020-01-10 15:34:28 +0100 |
| commit | 9e635c2851df6caee651e589fbf937b637973c91 (patch) | |
| tree | 4cc71cf81d6d97b69aed593a09257e723a7fa00c /drivers/hid/uhid.c | |
| parent | 20eee6e5af35d9586774e80b6e0b1850e7cc9899 (diff) | |
| download | linux-stable-9e635c2851df6caee651e589fbf937b637973c91.tar.gz linux-stable-9e635c2851df6caee651e589fbf937b637973c91.tar.bz2 linux-stable-9e635c2851df6caee651e589fbf937b637973c91.zip | |
HID: hidraw, uhid: Always report EPOLLOUT
hidraw and uhid device nodes are always available for writing so we should
always report EPOLLOUT and EPOLLWRNORM bits, not only in the cases when
there is nothing to read.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: be54e7461ffdc ("HID: uhid: Fix returning EPOLLOUT from uhid_char_poll")
Fixes: 9f3b61dc1dd7b ("HID: hidraw: Fix returning EPOLLOUT from hidraw_poll")
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/uhid.c')
| -rw-r--r-- | drivers/hid/uhid.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c index 935c3d0a3b63..8fe3efcb8327 100644 --- a/drivers/hid/uhid.c +++ b/drivers/hid/uhid.c @@ -766,13 +766,14 @@ unlock: static __poll_t uhid_char_poll(struct file *file, poll_table *wait) { struct uhid_device *uhid = file->private_data; + __poll_t mask = EPOLLOUT | EPOLLWRNORM; /* uhid is always writable */ poll_wait(file, &uhid->waitq, wait); if (uhid->head != uhid->tail) - return EPOLLIN | EPOLLRDNORM; + mask |= EPOLLIN | EPOLLRDNORM; - return EPOLLOUT | EPOLLWRNORM; + return mask; } static const struct file_operations uhid_fops = { |