On Mon, Apr 06, 2020 at 09:44:26PM -0300, Jason Gunthorpe wrote:
> From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
>
> If is_closed is set, and the event list is empty, then read() will return
> -EIO without blocking. After setting is_closed in
> ib_uverbs_free_event_queue(), we do trigger a wake_up on the poll_wait,
> but the fops->poll() function does not check it, so poll will continue to
> sleep on an empty list.
>
> Fixes: 14e23bd6d221 ("RDMA/core: Fix locking in ib_uverbs_event_read")
> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> ---
> drivers/infiniband/core/uverbs_main.c | 2 ++
> 1 file changed, 2 insertions(+)
Applied to for-next
Jason
