ext4: fix ext4_evict_inode() racing against workqueue processing code

[pandora-kernel.git] / fs / ext4 / page-io.c

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 809b310..047a6de 100644 (file)
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -50,11 +50,21 @@ void ext4_exit_pageio(void)
        kmem_cache_destroy(io_page_cachep);
 }
 
-void ext4_ioend_wait(struct inode *inode)
+/*
+ * This function is called by ext4_evict_inode() to make sure there is
+ * no more pending I/O completion work left to do.
+ */
+void ext4_ioend_shutdown(struct inode *inode)
 {
        wait_queue_head_t *wq = ext4_ioend_wq(inode);
 
        wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_ioend_count) == 0));
+       /*
+        * We need to make sure the work structure is finished being
+        * used before we let the inode get destroyed.
+        */
+       if (work_pending(&EXT4_I(inode)->i_unwritten_work))
+               cancel_work_sync(&EXT4_I(inode)->i_unwritten_work);
 }
 
 static void put_io_page(struct ext4_io_page *io_page)