From efc7ae3f249a6aa2de8f6bec56a2314badfd340a Mon Sep 17 00:00:00 2001 From: Angus Chen Date: Tue, 26 Nov 2024 20:42:58 +0800 Subject: [PATCH] uio: Fix return value of poll 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 Link: https://lore.kernel.org/r/20241126124259.1367-1-angus.chen@jaguarmicro.com Signed-off-by: Greg Kroah-Hartman --- 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 004a549c6c7d4..d93ed4e86a174 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) mutex_lock(&idev->info_lock); if (!idev->info || !idev->info->irq) - ret = -EIO; + ret = EPOLLERR; mutex_unlock(&idev->info_lock); if (ret)