Re: [PATCH AUTOSEL 4.19 2/2] btrfs: fix warning on PTR_ERR() against NULL device at btrfs_control_ioctl()

[Pavel Machek <pavel@denx.de>]

[-- Attachment #1: Type: text/plain, Size: 1083 bytes --]

Hi!

> From: Filipe Manana <fdmanana@suse.com>
> 
> [ Upstream commit 2342d6595b608eec94187a17dc112dd4c2a812fa ]
> 
> Smatch complains about calling PTR_ERR() against a NULL pointer:
> 
>   fs/btrfs/super.c:2272 btrfs_control_ioctl() warn: passing zero to 'PTR_ERR'
> 
> Fix this by calling PTR_ERR() against the device pointer only if it
> contains an error.

This patch was wrongly ported to 4.19. It is not needed there. Same
test is already performed 2 lines above.

Please drop.

BR,
								Pavel

> +++ b/fs/btrfs/super.c
> @@ -2283,7 +2283,10 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
>  					       &btrfs_root_fs_type);
>  		if (IS_ERR(device)) {
>  			mutex_unlock(&uuid_mutex);
> -			ret = PTR_ERR(device);
> +			if (IS_ERR(device))
> +				ret = PTR_ERR(device);
> +			else
> +				ret = 0;
>  			break;
>  		}
>  		ret = !(device->fs_devices->num_devices ==

-- 
DENX Software Engineering GmbH,        Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 195 bytes --]