diff --git a/share/man/man9/VOP_STRATEGY.9 b/share/man/man9/VOP_STRATEGY.9
index 709a929921b5..8c4fbace42a7 100644
--- a/share/man/man9/VOP_STRATEGY.9
+++ b/share/man/man9/VOP_STRATEGY.9
@@ -53,7 +53,9 @@ This call either reads or writes data from a file, depending on the value of
 .Pp
 The call may block.
 .Sh RETURN VALUES
-Zero is returned on success, otherwise an error is returned.
+Always zero.
+Errors should be signalled by setting BIO_ERROR on b_ioflags field in struct buf,
+and setting b_error to the appropriate errno value.
 .Sh SEE ALSO
 .\" .Xr buf 9 ,
 .Xr vnode 9
diff --git a/sys/fs/hpfs/hpfs_vnops.c b/sys/fs/hpfs/hpfs_vnops.c
index c5a2a06cf3e4..4ec6b1e618e6 100644
--- a/sys/fs/hpfs/hpfs_vnops.c
+++ b/sys/fs/hpfs/hpfs_vnops.c
@@ -661,7 +661,7 @@ hpfs_strategy(ap)
 			bp->b_error = error;
 			bp->b_ioflags |= BIO_ERROR;
 			bufdone(bp);
-			return (error);
+			return (0);
 		}
 		if ((long)bp->b_blkno == -1)
 			vfs_bio_clrbuf(bp);
diff --git a/sys/fs/msdosfs/msdosfs_vnops.c b/sys/fs/msdosfs/msdosfs_vnops.c
index ccbd0b12b6ac..9dc547f67606 100644
--- a/sys/fs/msdosfs/msdosfs_vnops.c
+++ b/sys/fs/msdosfs/msdosfs_vnops.c
@@ -1880,7 +1880,7 @@ msdosfs_strategy(ap)
 			bp->b_error = error;
 			bp->b_ioflags |= BIO_ERROR;
 			bufdone(bp);
-			return (error);
+			return (0);
 		}
 		if ((long)bp->b_blkno == -1)
 			vfs_bio_clrbuf(bp);
diff --git a/sys/fs/ntfs/ntfs_vnops.c b/sys/fs/ntfs/ntfs_vnops.c
index 76c3c64896f3..ee62a5c60d9c 100644
--- a/sys/fs/ntfs/ntfs_vnops.c
+++ b/sys/fs/ntfs/ntfs_vnops.c
@@ -339,7 +339,7 @@ ntfs_strategy(ap)
 		}
 	}
 	bufdone(bp);
-	return (error);
+	return (0);
 }
 
 static int
diff --git a/sys/fs/nwfs/nwfs_vnops.c b/sys/fs/nwfs/nwfs_vnops.c
index 9dcd9aa1e042..ca0a887bd130 100644
--- a/sys/fs/nwfs/nwfs_vnops.c
+++ b/sys/fs/nwfs/nwfs_vnops.c
@@ -804,7 +804,7 @@ static int nwfs_strategy (ap)
 	 */
 	if ((bp->b_flags & B_ASYNC) == 0 )
 		error = nwfs_doio(ap->a_vp, bp, cr, td);
-	return (error);
+	return (0);
 }
 
 
diff --git a/sys/fs/smbfs/smbfs_vnops.c b/sys/fs/smbfs/smbfs_vnops.c
index e34ebe2dbffa..9b1e76d345e2 100644
--- a/sys/fs/smbfs/smbfs_vnops.c
+++ b/sys/fs/smbfs/smbfs_vnops.c
@@ -864,7 +864,7 @@ smbfs_strategy (ap)
 
 	if ((bp->b_flags & B_ASYNC) == 0 )
 		error = smbfs_doio(ap->a_vp, bp, cr, td);
-	return error;
+	return (0);
 }
 
 int
diff --git a/sys/gnu/fs/ext2fs/ext2_vnops.c b/sys/gnu/fs/ext2fs/ext2_vnops.c
index f81d5097df1f..1b5023cccd6e 100644
--- a/sys/gnu/fs/ext2fs/ext2_vnops.c
+++ b/sys/gnu/fs/ext2fs/ext2_vnops.c
@@ -1399,7 +1399,7 @@ ext2_strategy(ap)
 			bp->b_error = error;
 			bp->b_ioflags |= BIO_ERROR;
 			bufdone(bp);
-			return (error);
+			return (0);
 		}
 		if ((long)bp->b_blkno == -1)
 			vfs_bio_clrbuf(bp);
diff --git a/sys/gnu/fs/reiserfs/reiserfs_vnops.c b/sys/gnu/fs/reiserfs/reiserfs_vnops.c
index e6323ead671e..12fe40918ffc 100644
--- a/sys/gnu/fs/reiserfs/reiserfs_vnops.c
+++ b/sys/gnu/fs/reiserfs/reiserfs_vnops.c
@@ -350,8 +350,13 @@ reiserfs_strategy(struct vop_strategy_args /* {
 		bp->b_ioflags |= BIO_ERROR;
 	}
 
+	if (error) {
+		bp->b_ioflags |= BIO_ERROR;
+		bp->b_error = error;
+	}
+
 	bufdone(bp);
-	return (error);
+	return (0);
 }
 
 /*
diff --git a/sys/gnu/fs/xfs/FreeBSD/xfs_vnops.c b/sys/gnu/fs/xfs/FreeBSD/xfs_vnops.c
index d0efcf29995b..6d8d4eb9866a 100644
--- a/sys/gnu/fs/xfs/FreeBSD/xfs_vnops.c
+++ b/sys/gnu/fs/xfs/FreeBSD/xfs_vnops.c
@@ -1136,7 +1136,7 @@ _xfs_strategy(
 			bp->b_error = error;
 			bp->b_ioflags |= BIO_ERROR;
 			bufdone(bp);
-			return (error);
+			return (0);
 		}
 		if ((long)bp->b_blkno == -1)
 			vfs_bio_clrbuf(bp);
diff --git a/sys/ufs/ufs/ufs_vnops.c b/sys/ufs/ufs/ufs_vnops.c
index e5047e9addbc..7b639e8b126a 100644
--- a/sys/ufs/ufs/ufs_vnops.c
+++ b/sys/ufs/ufs/ufs_vnops.c
@@ -2013,7 +2013,7 @@ ufs_strategy(ap)
 			bp->b_error = error;
 			bp->b_ioflags |= BIO_ERROR;
 			bufdone(bp);
-			return (error);
+			return (0);
 		}
 		if ((long)bp->b_blkno == -1)
 			vfs_bio_clrbuf(bp);