1 files changed, 40 insertions, 31 deletions

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 6306eaae378b..770f3a720db9 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1351,9 +1351,15 @@ int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, u64 *dblock, unsi
 	return ret;
 }
 
+/*
+ * NOTE: Never call gfs2_block_zero_range with an open transaction because it
+ * uses iomap write to perform its actions, which begin their own transactions
+ * (iomap_begin, page_prepare, etc.)
+ */
 static int gfs2_block_zero_range(struct inode *inode, loff_t from,
 				 unsigned int length)
 {
+	BUG_ON(current->journal_info);
 	return iomap_zero_range(inode, from, length, NULL, &gfs2_iomap_ops);
 }
 
@@ -1414,6 +1420,16 @@ static int trunc_start(struct inode *inode, u64 newsize)
 	u64 oldsize = inode->i_size;
 	int error;
 
+	if (!gfs2_is_stuffed(ip)) {
+		unsigned int blocksize = i_blocksize(inode);
+		unsigned int offs = newsize & (blocksize - 1);
+		if (offs) {
+			error = gfs2_block_zero_range(inode, newsize,
+						      blocksize - offs);
+			if (error)
+				return error;
+		}
+	}
 	if (journaled)
 		error = gfs2_trans_begin(sdp, RES_DINODE + RES_JDATA, GFS2_JTRUNC_REVOKES);
 	else
@@ -1427,19 +1443,10 @@ static int trunc_start(struct inode *inode, u64 newsize)
 
 	gfs2_trans_add_meta(ip->i_gl, dibh);
 
-	if (gfs2_is_stuffed(ip)) {
+	if (gfs2_is_stuffed(ip))
 		gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode) + newsize);
-	} else {
-		unsigned int blocksize = i_blocksize(inode);
-		unsigned int offs = newsize & (blocksize - 1);
-		if (offs) {
-			error = gfs2_block_zero_range(inode, newsize,
-						      blocksize - offs);
-			if (error)
-				goto out;
-		}
+	else
 		ip->i_diskflags |= GFS2_DIF_TRUNC_IN_PROG;
-	}
 
 	i_size_write(inode, newsize);
 	ip->i_inode.i_mtime = ip->i_inode.i_ctime = current_time(&ip->i_inode);
@@ -1761,7 +1768,7 @@ static int punch_hole(struct gfs2_inode *ip, u64 offset, u64 length)
 	u64 lblock = (offset + (1 << bsize_shift) - 1) >> bsize_shift;
 	__u16 start_list[GFS2_MAX_META_HEIGHT];
 	__u16 __end_list[GFS2_MAX_META_HEIGHT], *end_list = NULL;
-	unsigned int start_aligned, uninitialized_var(end_aligned);
+	unsigned int start_aligned, end_aligned;
 	unsigned int strip_h = ip->i_height - 1;
 	u32 btotal = 0;
 	int ret, state;
@@ -2448,25 +2455,7 @@ int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length)
 	loff_t start, end;
 	int error;
 
-	start = round_down(offset, blocksize);
-	end = round_up(offset + length, blocksize) - 1;
-	error = filemap_write_and_wait_range(inode->i_mapping, start, end);
-	if (error)
-		return error;
-
-	if (gfs2_is_jdata(ip))
-		error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_JDATA,
-					 GFS2_JTRUNC_REVOKES);
-	else
-		error = gfs2_trans_begin(sdp, RES_DINODE, 0);
-	if (error)
-		return error;
-
-	if (gfs2_is_stuffed(ip)) {
-		error = stuffed_zero_range(inode, offset, length);
-		if (error)
-			goto out;
-	} else {
+	if (!gfs2_is_stuffed(ip)) {
 		unsigned int start_off, end_len;
 
 		start_off = offset & (blocksize - 1);
@@ -2489,6 +2478,26 @@ int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length)
 		}
 	}
 
+	start = round_down(offset, blocksize);
+	end = round_up(offset + length, blocksize) - 1;
+	error = filemap_write_and_wait_range(inode->i_mapping, start, end);
+	if (error)
+		return error;
+
+	if (gfs2_is_jdata(ip))
+		error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_JDATA,
+					 GFS2_JTRUNC_REVOKES);
+	else
+		error = gfs2_trans_begin(sdp, RES_DINODE, 0);
+	if (error)
+		return error;
+
+	if (gfs2_is_stuffed(ip)) {
+		error = stuffed_zero_range(inode, offset, length);
+		if (error)
+			goto out;
+	}
+
 	if (gfs2_is_jdata(ip)) {
 		BUG_ON(!current->journal_info);
 		gfs2_journaled_truncate_range(inode, offset, length);