[GFS2] Finally get ref counting correct

The last patch missed some other instances of incorrect ref counting,
this fixes all of those too.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/dir.c

@@ -776,9 +776,9 @@ static struct gfs2_dirent *gfs2_dirent_search(struct inode *inode,
 				goto got_dent;
 			leaf = (struct gfs2_leaf *)bh->b_data;
 			ln = be64_to_cpu(leaf->lf_next);
-			brelse(bh);
 			if (!ln)
 				break;
+			brelse(bh);
 			error = get_leaf(ip, ln, &bh);
 		} while(!error);
 
@@ -789,9 +789,11 @@ static struct gfs2_dirent *gfs2_dirent_search(struct inode *inode,
 	if (error)
 		return ERR_PTR(error);
 	dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size, scan, name, NULL);
-	brelse(bh);
-
 got_dent:
+	if (unlikely(IS_ERR(dent))) {
+		brelse(bh);
+		bh = NULL;
+	}
 	*pbh = bh;
 	return dent;
 }
@@ -1475,6 +1477,7 @@ int gfs2_dir_search(struct inode *dir, const struct qstr *name,
 		brelse(bh);
 		return 0;
 	}
+	brelse(bh);
 	return -ENOENT;
 }
 
@@ -1616,6 +1619,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
 	   previous entry otherwise */
 	dent = gfs2_dirent_search(dip->i_vnode, name, gfs2_dirent_prev, &bh);
 	if (!dent) {
+		brelse(bh);
 		gfs2_consist_inode(dip);
 		return -EIO;
 	}
@@ -1636,8 +1640,8 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
 		if (!entries)
 			gfs2_consist_inode(dip);
 		leaf->lf_entries = cpu_to_be16(--entries);
-		brelse(bh);
 	}
+	brelse(bh);
 
 	error = gfs2_meta_inode_buffer(dip, &bh);
 	if (error)
@@ -1676,6 +1680,7 @@ int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
 
 	dent = gfs2_dirent_search(dip->i_vnode, filename, gfs2_dirent_find, &bh);
 	if (!dent) {
+		brelse(bh);
 		gfs2_consist_inode(dip);
 		return -EIO;
 	}
@@ -1955,8 +1960,10 @@ int gfs2_diradd_alloc_required(struct inode *inode,
 	struct buffer_head *bh;
 
 	dent = gfs2_dirent_search(inode, name, gfs2_dirent_find_space, &bh);
-	if (!dent)
+	if (!dent) {
+		brelse(bh);
 		return 1;
+	}
 	if (IS_ERR(dent))
 		return PTR_ERR(dent);
 	brelse(bh);

fs/gfs2/log.c

@@ -196,14 +196,14 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 
 void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
 {
-	up_read(&sdp->sd_log_flush_lock);
 
 	gfs2_log_lock(sdp);
 	sdp->sd_log_blks_free += blks;
 	/* printk(KERN_INFO "released %u blocks (%u left)\n", blks, sdp->sd_log_blks_free); */
 	gfs2_assert_withdraw(sdp,
 			     sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
 	gfs2_log_unlock(sdp);
+	up_read(&sdp->sd_log_flush_lock);
 }
 
 static uint64_t log_bmap(struct gfs2_sbd *sdp, unsigned int lbn)