On Sat, May 06, 2017 at 11:01:05PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> Variable ret is assigned to zero and is always zero throughout the
> function. Thus the check for ret being less than zero is always
> false and so mapping_set_error always has an -EIO error passed to
> it. Hence we can remove the redundant assignment and check on ret.
>
> Detected by CoverityScan, CID#1414312 ("Logically dead code")
>
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> ---
> fs/btrfs/extent_io.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index d8da3edf2ac3..7922cd34ba82 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -2447,7 +2447,6 @@ void end_extent_writepage(struct page *page, int err, u64 start, u64 end)
> {
> int uptodate = (err == 0);
> struct extent_io_tree *tree;
> - int ret = 0;
>
> tree = &BTRFS_I(page->mapping->host)->io_tree;
>
> @@ -2458,8 +2457,7 @@ void end_extent_writepage(struct page *page, int err, u64 start, u64 end)
> if (!uptodate) {
> ClearPageUptodate(page);
> SetPageError(page);
> - ret = ret < 0 ? ret : -EIO;
> - mapping_set_error(page->mapping, ret);
> + mapping_set_error(page->mapping, -EIO);
The passed 'err' should be used as what ret did, ie.
ret = err < 0 ? err : -EIO;
Thanks,
-liubo
> }
> }
>
> --
> 2.11.0
>
> --
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