From 359cfdfd9985c26e22c0aed7c2b88a482d9784ca Mon Sep 17 00:00:00 2001
From: ache <ache@FreeBSD.org>
Date: Fri, 23 Jan 2004 06:00:41 +0000
Subject: Copy comment about caller check from ffs_read to ffs_extread, don't
 check for uio_resid < 0 here too.

---
 sys/ufs/ffs/ffs_vnops.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sys/ufs/ffs/ffs_vnops.c b/sys/ufs/ffs/ffs_vnops.c
index c90f450..848ac9d 100644
--- a/sys/ufs/ffs/ffs_vnops.c
+++ b/sys/ufs/ffs/ffs_vnops.c
@@ -975,14 +975,18 @@ ffs_extread(struct vnode *vp, struct uio *uio, int ioflag)
 
 #endif
 	orig_resid = uio->uio_resid;
-	if (orig_resid <= 0)
+	if (orig_resid == 0)
 		return (0);
+	/*
+	 * The caller is supposed to check if
+	 * uio->uio_offset >= 0 and uio->uio_resid >= 0.
+	 */
 
 	bytesinfile = dp->di_extsize - uio->uio_offset;
 	if (bytesinfile <= 0) {
 		if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
 			ip->i_flag |= IN_ACCESS;
-		return 0;
+		return (0);
 	}
 
 	for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
-- 
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