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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: beafc54c4e ("UIO: Add the User IO core code")
Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
Link: https://lore.kernel.org/r/20241126124259.1367-1-angus.chen@jaguarmicro.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/1134/merge
Angus Chen 2024-11-26 20:42:58 +08:00 committed by Greg Kroah-Hartman
parent 54932d7254
commit efc7ae3f24
1 changed files with 1 additions and 1 deletions
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2
drivers/uio/uio.c
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@ -565,7 +565,7 @@ static __poll_t uio_poll(struct file *filep, poll_table *wait)
mutex_lock(&idev->info_lock); mutex_lock(&idev->info_lock);
if (!idev->info || !idev->info->irq) if (!idev->info || !idev->info->irq)
ret = -EIO; ret = EPOLLERR;
mutex_unlock(&idev->info_lock); mutex_unlock(&idev->info_lock);
if (ret) if (ret)