gfs2: Fix usage of bio->bi_status in gfs2_end_log_write

bio->bi_status is an index into the blk_errors array, not an errno. Its
__bitwise tag is cast away here, resulting in a sparse warning:

  fs/gfs2/lops.c:207:22: warning: cast from restricted blk_status_t

We could either add __force to the cast and continue logging bi_status
in the error message, or we could look up the errno in the array and log
that. As sdp->sd_log_error is used as an errno in all other cases, look
up the errno here for consistency.

Signed-off-by: Andrew Price <[email protected]>
Signed-off-by: Andreas Gruenbacher <[email protected]>

Author: andyprice

fs/gfs2/lops.c

@@ -204,9 +204,11 @@ static void gfs2_end_log_write(struct bio *bio)
 	struct bvec_iter_all iter_all;
 
 	if (bio->bi_status) {
-		if (!cmpxchg(&sdp->sd_log_error, 0, (int)bio->bi_status))
+		int err = blk_status_to_errno(bio->bi_status);
+
+		if (!cmpxchg(&sdp->sd_log_error, 0, err))
 			fs_err(sdp, "Error %d writing to journal, jid=%u\n",
-			       bio->bi_status, sdp->sd_jdesc->jd_jid);
+			       err, sdp->sd_jdesc->jd_jid);
 		gfs2_withdraw_delayed(sdp);
 		/* prevent more writes to the journal */
 		clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);