On Sat, Jun 25, 2016 at 10:43:33PM +0100, Luis de Bethencourt wrote:
> On 25/06/16 22:36, Greg KH wrote:
> > On Thu, Jun 23, 2016 at 01:36:17PM +0100, Luis de Bethencourt wrote:
> >> The common format to check if a function returned an error pointer is to
> >> use PTR_ERR(). Instead of ERR_PTR() which is used to return said errors.
> >>
> >> Signed-off-by: Luis de Bethencourt <luisbg@xxxxxxxxxxxxxxx>
> >> Reviewed-by: Julian Calaby <julian.calaby@xxxxxxxxx>
> >> ---
> >> drivers/staging/wilc1000/wilc_debugfs.c | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c
> >> index fcbc95d..48797dc 100644
> >> --- a/drivers/staging/wilc1000/wilc_debugfs.c
> >> +++ b/drivers/staging/wilc1000/wilc_debugfs.c
> >> @@ -107,7 +107,7 @@ static int __init wilc_debugfs_init(void)
> >> struct wilc_debugfs_info_t *info;
> >>
> >> wilc_dir = debugfs_create_dir("wilc_wifi", NULL);
> >> - if (wilc_dir == ERR_PTR(-ENODEV)) {
> >> + if (PTR_ERR(wilc_dir) == -ENODEV) {
> >> /* it's not error. the debugfs is just not being enabled. */
> >> printk("ERR, kernel has built without debugfs support\n");
> >> return 0;
> >
> > No, the best way to do this is to just ignore the return value, you
> > don't care about it. It can be passed back into any debugfs calls just
> > fine.
> >
> > So don't check the value and all is good, debugfs was written in a way
> > to make it _easy_ to use, no need for fancy error checking at all with
> > it.
> >
> > thanks,
> >
> > greg k-h
> >
>
> Thanks for the review Greg.
>
> Just to make sure. You are proposing I just drop the 3 if checks? [0]
>
> If that's what you mean I will send a patch as soon as you confirm :)
>
> Happy hacking,
> Luis
>
>
>
> [0] Making the function look like this:
> static int __init wilc_debugfs_init(void)
> {
> int i;
>
> struct dentry *debugfs_files;
> struct wilc_debugfs_info_t *info;
>
> wilc_dir = debugfs_create_dir("wilc_wifi", NULL);
> for (i = 0; i < ARRAY_SIZE(debugfs_info); i++) {
> info = &debugfs_info[i];
> debugfs_files = debugfs_create_file(info->name,
> info->perm,
> wilc_dir,
> &info->data,
> &info->fops);
Why even assign anything to debugfs_files?
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