shithub: lwext4

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ext4_journal: fix jbd_trans_get_access flushing the wrong buffer.

--- a/lwext4/ext4_journal.c

+++ b/lwext4/ext4_journal.c

@@ -1123,13 +1123,16 @@

 {

 	int r = EOK;

 	struct ext4_fs *fs = journal->jbd_fs->inode_ref.fs;

+	struct jbd_buf *jbd_buf = block->buf->end_write_arg;

 	/* If the buffer has already been modified, we should

 	 * flush dirty data in this buffer to disk.*/

 	if (ext4_bcache_test_flag(block->buf, BC_DIRTY) &&

-	    block->buf->end_write == jbd_trans_end_write &&

-	    block->buf->end_write_arg != trans) {

-		r = ext4_block_flush_buf(fs->bdev, block->buf);

+	    block->buf->end_write == jbd_trans_end_write) {

+		ext4_assert(jbd_buf);

+		if (jbd_buf->trans != trans)

+			r = ext4_block_flush_buf(fs->bdev, block->buf);

+

 	}

 	return r;

 }