From 064989983a5c0b0af3943d37c80f102710aeec6f Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Tue, 11 Feb 2003 13:13:10 +0000
Subject: Don't short-circuit zero-length requests of they are BIO_[SG]ETATTR.

---
 sys/geom/geom_io.c | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

(limited to 'sys/geom/geom_io.c')

diff --git a/sys/geom/geom_io.c b/sys/geom/geom_io.c
index f334817..85ffe33 100644
--- a/sys/geom/geom_io.c
+++ b/sys/geom/geom_io.c
@@ -393,16 +393,24 @@ g_io_schedule_down(struct thread *tp __unused)
 			g_io_deliver(bp, error);
 			continue;
 		}
-		/* Truncate requests to the end of providers media. */
-		excess = bp->bio_offset + bp->bio_length;
-		if (excess > bp->bio_to->mediasize) {
-			excess -= bp->bio_to->mediasize;
-			bp->bio_length -= excess;
-		}
-		/* Deliver zero length transfers right here. */
-		if (bp->bio_length == 0) {
-			g_io_deliver(bp, 0);
-			continue;
+		switch (bp->bio_cmd) {
+		case BIO_READ:
+		case BIO_WRITE:
+		case BIO_DELETE:
+			/* Truncate requests to the end of providers media. */
+			excess = bp->bio_offset + bp->bio_length;
+			if (excess > bp->bio_to->mediasize) {
+				excess -= bp->bio_to->mediasize;
+				bp->bio_length -= excess;
+			}
+			/* Deliver zero length transfers right here. */
+			if (bp->bio_length == 0) {
+				g_io_deliver(bp, 0);
+				continue;
+			}
+			break;
+		default:
+			break;
 		}
 		bp->bio_to->geom->start(bp);
 		if (pace) {
-- 
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