On Mon, Jul 29, 2013 at 12:41:31PM +0530, Amit Shah wrote:
> On (Mon) 22 Jul 2013 [23:41:00], Dan Carpenter wrote:
> > The PTR_ERR(NULL) here is not useful.
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> > ---
> > v2: completely different
> >
> > diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
> > index 1b456fe..4cf46d8 100644
> > --- a/drivers/char/virtio_console.c
> > +++ b/drivers/char/virtio_console.c
> > @@ -2215,10 +2215,8 @@ 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_warning("Error creating debugfs dir for virtio-ports\n");
>
> When debugfs is enabled and creating the dir fails, we'll print this
> warning message.
>
> When debugfs is disabled, we'll get an error return, and not print any
> message.
Not true, you will still print the message if debugfs is disabled, as
.debugfs_dir will not be NULL.
Why even print anything at all? It's debugfs, you shouldn't really care
that much about it :)
thanks,
greg k-h
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