[PATCH] loop: potential kernel hang waiting for kthread
Check that kernel_thread() succeeded, so we don't wait for something which
cannot happen.
Signed-off-by: Herbert Poetzl <herbert@13thfloor.at>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 74bf025..9c3b94e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -839,7 +839,9 @@
set_blocksize(bdev, lo_blocksize);
- kernel_thread(loop_thread, lo, CLONE_KERNEL);
+ error = kernel_thread(loop_thread, lo, CLONE_KERNEL);
+ if (error < 0)
+ goto out_putf;
wait_for_completion(&lo->lo_done);
return 0;