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SubjectRe: [PATCH] virtio_console: correct error message on failure of debugfs_create_dir
On (Thu) 20 Dec 2012 [14:11:21], Sasha Levin wrote:
> debugfs_create_dir() returns NULL if it fails, there's little point in
> calling PTR_ERR on it.
>
> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
> ---
> drivers/char/virtio_console.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
> index c594cb1..490b70e 100644
> --- a/drivers/char/virtio_console.c
> +++ b/drivers/char/virtio_console.c
> @@ -2212,10 +2212,9 @@ static int __init init(void)
> }
>
> pdrvdata.debugfs_dir = debugfs_create_dir("virtio-ports", NULL);
> - if (!pdrvdata.debugfs_dir) {
> - pr_warning("Error %ld creating debugfs dir for virtio-ports\n",
> - PTR_ERR(pdrvdata.debugfs_dir));
> - }
> + if (!pdrvdata.debugfs_dir)
> + pr_warn("Error creating debugfs dir for virtio-ports\n");

debugfs_create_dir() does return an error value if debugfs is not
enabled.

This check for !pdrvdata.debugfs_dir should infact use
IS_ERR_OR_NULL(). Care to submit a patch for that?

Amit


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