Commit 57e22247 authored by Loic Poulain's avatar Loic Poulain Committed by David S. Miller
Browse files

net: wwan: core: Return poll error in case of port removal 



Ensure that the poll system call returns proper error flags when port
is removed (nullified port ops), allowing user side to properly fail,
without further read or write.

Fixes: 9a44c1cc ("net: Add a WWAN subsystem")
Signed-off-by: default avatarLoic Poulain <loic.poulain@linaro.org>
Reviewed-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a9b5d871

drivers/net/wwan/wwan_core.c

+2 −0
Original line number Diff line number Diff line
@@ -508,6 +508,8 @@ static __poll_t wwan_port_fops_poll(struct file *filp, poll_table *wait) 
		mask |= EPOLLOUT | EPOLLWRNORM;

	if (!is_read_blocked(port))

		mask |= EPOLLIN | EPOLLRDNORM;

	if (!port->ops)

		mask |= EPOLLHUP | EPOLLERR;



	return mask;

}