linux-kernel - Re: [PATCH] btrfs: qgroup: Fix inconsistent IS_ERR and PTR

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Message-ID: <20190131114926.GA2900@twin.jikos.cz>
Date:   Thu, 31 Jan 2019 12:49:26 +0100
From:   David Sterba <dsterba@...e.cz>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>, Qu Wenruo <wqu@...e.com>,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: qgroup: Fix inconsistent IS_ERR and PTR_ERR

On Wed, Jan 30, 2019 at 08:30:16PM -0600, Gustavo A. R. Silva wrote:
> Fix inconsistent IS_ERR and PTR_ERR in btrfs_qgroup_trace_subtree_after_cow
> 
> The proper pointer to be passed as argument is reloc_eb.
> 
> This bug was detected with the help of Coccinelle.
> 
> Fixes: 2b35a512e9cf ("btrfs: qgroup: Use delayed subtree rescan for balance")
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---
>  fs/btrfs/qgroup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
> index 8559ed92d708..16d7ec8e4a06 100644
> --- a/fs/btrfs/qgroup.c
> +++ b/fs/btrfs/qgroup.c
> @@ -3931,7 +3931,7 @@ int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans,
>  				   block->reloc_generation, block->level,
>  				   &block->first_key);
>  	if (IS_ERR(reloc_eb)) {
> -		ret = PTR_ERR(subv_eb);
> +		ret = PTR_ERR(reloc_eb);

Thanks, this was reported and fixed but the change has not propagated to
for-next yet.