linux-kernel - Re: [PATCH 1/3] f2fs: compress: fix to call f2fs_put_dnode() paired with f2fs_get

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Date:   Mon, 10 May 2021 08:51:04 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, chao@...nel.org
Subject: Re: [PATCH 1/3] f2fs: compress: fix to call f2fs_put_dnode() paired
 with f2fs_get_block()

On 05/10, Chao Yu wrote:
> f2fs_get_block() and f2fs_put_dnode() should be called as a pair,
> add missing f2fs_put_dnode() in prepare_compress_overwrite().
> 
> Fixes: 4c8ff7095bef ("f2fs: support data compression")
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> ---
>  fs/f2fs/compress.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> index c208563eac28..d5cb0ba9a0e1 100644
> --- a/fs/f2fs/compress.c
> +++ b/fs/f2fs/compress.c
> @@ -1088,6 +1088,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
>  
>  		for (i = cc->cluster_size - 1; i > 0; i--) {
>  			ret = f2fs_get_block(&dn, start_idx + i);
> +			f2fs_put_dnode(&dn);

f2fs_reserve_block()
 -> need_put = true;
  -> f2fs_put_dnode();

>  			if (ret) {
>  				i = cc->cluster_size;
>  				break;
> -- 
> 2.29.2