[U-Boot] [PATCH] UBIFS: Improve error message when reading superblock failed

[Detlev Zundel <dzu@denx.de>]

Hi Bernhard,

> In addition to the error message also display the error code. I had the
> problem that my malloc memory was not enough (ENOMEM), and if u-boot
> had displayed the error code immediately that would have saved me some
> debugging.
>
> Signed-off-by: Bernhard Walle <walle@corscience.de>
> ---
>  fs/ubifs/super.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
> index 26b48f0..0b1440b 100644
> --- a/fs/ubifs/super.c
> +++ b/fs/ubifs/super.c
> @@ -1191,7 +1191,7 @@ int ubifs_mount(char *vol_name)
>  	mnt = NULL;
>  	ret = ubifs_get_sb(&ubifs_fs_type, flags, name, data, mnt);
>  	if (ret) {
> -		printf("Error reading superblock on volume '%s'!\n", name);
> +		printf("Error reading superblock on volume '%s': %d!\n", name, -ret);
>  		return -1;
>  	}

I think this makes sense, but I think it would be more natural to print
the real error code, not the negative value.  I don't know how to search
for all such occurrences, but I cannot find any but a lot of sites
printing the error code as is.

Cheers
  Detlev

-- 
The fact is, volatile on data structures is a bug. It's a wart in the C 
language. It shouldn't be used.
                                   -- Linus Torvalds 
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