[patch] xfs: don't allow negative error tags

[Dan Carpenter]

On Fri, Jun 24, 2016 at 09:12:25PM +0800, Jeff Liu wrote:
> Hi Dan,
> 
> xfs_errortag_add() is called by xfs_file_ioctl(), which accept the 1st
> argument as signed, i.e,
> 
> typedef struct xfs_error_injection {
> __s32 fd;
> __s32 errtag;
> } xfs_error_injection_t;
> 
> Should we make it happy as well? Also, the typedef can be converted to
> to struct xfs_error_injection by removing the depreciated
> xfs_error_injection_t
> syntax if so.

That has been the user interface for a while so I didn't want to change
it.

regards,
dan carpenter