gfs2: Additional information when gfs2_ail1_flush withdraws

Before this patch, if gfs2_ail1_flush gets an error from function
gfs2_ail1_start_one (which comes indirectly from generic_writepages)
the file system is withdrawn, but without any explanation why.

This patch adds an error message if gfs2_ail1_flush gets an error
from gfs2_ail1_start_one.

Signed-off-by: Bob Peterson <[email protected]>

Author: AstralBob

fs/gfs2/log.c

@@ -172,8 +172,11 @@ void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc)
 	}
 	spin_unlock(&sdp->sd_ail_lock);
 	blk_finish_plug(&plug);
-	if (ret)
+	if (ret) {
+		gfs2_lm(sdp, "gfs2_ail1_start_one (generic_writepages) "
+			"returned: %d\n", ret);
 		gfs2_withdraw(sdp);
+	}
 	trace_gfs2_ail_flush(sdp, wbc, 0);
 }