xfs: global error sign conversion

Convert all the errors the core XFs code to negative error signs
like the rest of the kernel and remove all the sign conversion we
do in the interface layers.

Errors for conversion (and comparison) found via searches like:

$ git grep " E" fs/xfs
$ git grep "return E" fs/xfs
$ git grep " E[A-Z].*;$" fs/xfs

Negation points found via searches like:

$ git grep "= -[a-z,A-Z]" fs/xfs
$ git grep "return -[a-z,A-D,F-Z]" fs/xfs
$ git grep " -[a-z].*;" fs/xfs

[ with some bits I missed from Brian Foster ]

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index 3fee16e63f3a..13d08a1b390e 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -124,7 +124,7 @@ xfs_trim_extents(
                 }
 
                 trace_xfs_discard_extent(mp, agno, fbno, flen);
-                error = -blkdev_issue_discard(bdev, dbno, dlen, GFP_NOFS, 0);
+                error = blkdev_issue_discard(bdev, dbno, dlen, GFP_NOFS, 0);
                 if (error)
                         goto out_del_cursor;
                 *blocks_trimmed += flen;
@@ -195,7 +195,7 @@ xfs_ioc_trim(
         end_agno = xfs_daddr_to_agno(mp, end);
 
         for (agno = start_agno; agno <= end_agno; agno++) {
-                error = -xfs_trim_extents(mp, agno, start, end, minlen,
+                error = xfs_trim_extents(mp, agno, start, end, minlen,
                                           &blocks_trimmed);
                 if (error)
                         last_error = error;
@@ -222,11 +222,11 @@ xfs_discard_extents(
                 trace_xfs_discard_extent(mp, busyp->agno, busyp->bno,
                                          busyp->length);
 
-                error = -blkdev_issue_discard(mp->m_ddev_targp->bt_bdev,
+                error = blkdev_issue_discard(mp->m_ddev_targp->bt_bdev,
                                 XFS_AGB_TO_DADDR(mp, busyp->agno, busyp->bno),
                                 XFS_FSB_TO_BB(mp, busyp->length),
                                 GFP_NOFS, 0);
-                if (error && error != EOPNOTSUPP) {
+                if (error && error != -EOPNOTSUPP) {
                         xfs_info(mp,
          "discard failed for extent [0x%llu,%u], error %d",
                                  (unsigned long long)busyp->bno,