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charset="utf-8" The return type of __poll_t can't be negative, -EIO will be translate to __poll_t,and will return to caller. Fixes: beafc54c4e2f ("UIO: Add the User IO core code") Signed-off-by: Angus Chen --- drivers/uio/uio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 004a549c6c7d..d93ed4e86a17 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -565,7 +565,7 @@ static __poll_t uio_poll(struct file *filep, poll_table= *wait) =20 mutex_lock(&idev->info_lock); if (!idev->info || !idev->info->irq) - ret =3D -EIO; + ret =3D EPOLLERR; mutex_unlock(&idev->info_lock); =20 if (ret) --=20 2.34.1