[PATCH 2/7] dax: Missing unlock in error path

[Matthew Wilcox]

If the file was truncated, we have to drop the i_mmap_mutex before
returning an error.

Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
---
 fs/dax.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/dax.c b/fs/dax.c
index 90418ca..fabe9da 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -357,6 +357,7 @@ static int do_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
 			size = (i_size_read(inode) + PAGE_SIZE - 1) >>
 								PAGE_SHIFT;
 			if (vmf->pgoff >= size) {
+				mutex_unlock(&mapping->i_mmap_mutex);
 				error = -EIO;
 				goto out;
 			}
-- 
2.1.0


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