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| author |   Fabian Henneke <fabian.henneke@gmail.com> | 2019-07-09 13:03:37 +0200 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2019-08-05 14:07:13 +0200 |
| commit | 378b80370aa1fe50f9c48a3ac8af3e416e73b89f (patch) | |
| tree | 3e879f130ef0b40c1d3c857cce17f6bbbd79aca8 /drivers/hid/hidraw.c | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid (diff) | |
| download | linux-dev-378b80370aa1fe50f9c48a3ac8af3e416e73b89f.tar.xz linux-dev-378b80370aa1fe50f9c48a3ac8af3e416e73b89f.zip | |
hidraw: Return EPOLLOUT from hidraw_poll
Always return EPOLLOUT from hidraw_poll when a device is connected.
This is safe since writes are always possible (but will always block).
hidraw does not support non-blocking writes and instead always calls
blocking backend functions on write requests. Hence, so far, a call to
poll never returned EPOLLOUT, which confuses tools like socat.
Signed-off-by: Fabian Henneke <fabian.henneke@gmail.com>
In-reply-to: <CA+hv5qkyis03CgYTWeWX9cr0my-d2Oe+aZo+mjmWRXgjrGqyrw@mail.gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hidraw.c')
| -rw-r--r-- | drivers/hid/hidraw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index 006bd6f4f653..24f40a3ddded 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -252,7 +252,7 @@ static __poll_t hidraw_poll(struct file *file, poll_table *wait) poll_wait(file, &list->hidraw->wait, wait); if (list->head != list->tail) - return EPOLLIN | EPOLLRDNORM; + return EPOLLIN | EPOLLRDNORM | EPOLLOUT; if (!list->hidraw->exist) return EPOLLERR | EPOLLHUP; return 0; |