UIO: cdev lock_kernel() pushdown (fbc8a81d) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/uio/uio.c

+12 −5

Original line number	Diff line number	Diff line
		@@ -297,12 +297,17 @@ static int uio_open(struct inode inode, struct file filep)
		struct uio_listener *listener;
		int ret = 0;

		lock_kernel();
		idev = idr_find(&uio_idr, iminor(inode));
		if (!idev)
		return -ENODEV;
		if (!idev) {
		ret = -ENODEV;
		goto out;
		}

		if (!try_module_get(idev->owner))
		return -ENODEV;
		if (!try_module_get(idev->owner)) {
		ret = -ENODEV;
		goto out;
		}

		listener = kmalloc(sizeof(*listener), GFP_KERNEL);
		if (!listener) {
		@@ -319,7 +324,7 @@ static int uio_open(struct inode inode, struct file filep)
		if (ret)
		goto err_infoopen;
		}

		unlock_kernel();
		return 0;

		err_infoopen:
		@@ -329,6 +334,8 @@ static int uio_open(struct inode inode, struct file filep)

		module_put(idev->owner);

		out:
		unlock_kernel();
		return ret;
		}