[PATCH v2 4/4] vgaswitcheroo: do not check for NULL debugfs dentry

[Das, Nirmoy]

On 10/17/2021 10:03 PM, Lukas Wunner wrote:
> On Wed, Oct 13, 2021 at 08:36:01PM +0200, Nirmoy Das wrote:
>> Debugfs APIs returns encoded error on failure so use
>> debugfs_lookup() instead of checking for NULL.
> The commit message no longer matches up with the patch itself
> (debugfs_lookup() isn't called).
>
> My suggestion would be something like:
>
>    Retry creation of the vga_switcheroo debugfs if a previous
>    invocation of debugfs_create_dir() returned an error code.
>
> With that addressed,
> Reviewed-by: Lukas Wunner <lukas at wunner.de>


Thanks, Lukas. Yes, I missed that commit message modification.


Nirmoy

>
> Thanks,
>
> Lukas
>
>> Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
>> ---
>>   drivers/gpu/vga/vga_switcheroo.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
>> index 365e6ddbe90f..07ab8d85e899 100644
>> --- a/drivers/gpu/vga/vga_switcheroo.c
>> +++ b/drivers/gpu/vga/vga_switcheroo.c
>> @@ -914,7 +914,7 @@ static void vga_switcheroo_debugfs_fini(struct vgasr_priv *priv)
>>   static void vga_switcheroo_debugfs_init(struct vgasr_priv *priv)
>>   {
>>   	/* already initialised */
>> -	if (priv->debugfs_root)
>> +	if (priv->debugfs_root && !IS_ERR(priv->debugfs_root))
>>   		return;
>>
>>   	priv->debugfs_root = debugfs_create_dir("vgaswitcheroo", NULL);
>> --
>> 2.32.0