xfs: kill copy and paste segment checks in xfs_file_aio_read

The generic segment check code now returns a count of the number of
bytes in the iovec, so we don't need to roll our own anymore.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 3 insertions, 14 deletions

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 59e22c989cd4..c4559c6e6f2c 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -236,7 +236,6 @@ xfs_file_aio_read(
         ssize_t                 ret = 0;
         int                     ioflags = 0;
         xfs_fsize_t             n;
-        unsigned long           seg;
 
         XFS_STATS_INC(xs_read_calls);
 
@@ -247,19 +246,9 @@ xfs_file_aio_read(
         if (file->f_mode & FMODE_NOCMTIME)
                 ioflags |= IO_INVIS;
 
-        /* START copy & waste from filemap.c */
-        for (seg = 0; seg < nr_segs; seg++) {
-                const struct iovec *iv = &iovp[seg];
-
-                /*
-                 * If any segment has a negative length, or the cumulative
-                 * length ever wraps negative then return -EINVAL.
-                 */
-                size += iv->iov_len;
-                if (unlikely((ssize_t)(size|iv->iov_len) < 0))
-                        return XFS_ERROR(-EINVAL);
-        }
-        /* END copy & waste from filemap.c */
+        ret = generic_segment_checks(iovp, &nr_segs, &size, VERIFY_WRITE);
+        if (ret < 0)
+                return ret;
 
         if (unlikely(ioflags & IO_ISDIRECT)) {
                 xfs_buftarg_t   *target =