[PATCH] usb: fix uvc_alloc_entity() allocation alignment

[Nadav Amit]

The use of ALIGN() in uvc_alloc_entity() is incorrect, since the size of
(entity->pads) is not a power of two. As a stop-gap, until a better
solution is adapted, use roundup() instead.

Found by a static assertion. Compile-tested only.

Fixes: 4ffc2d89f38a ("uvcvideo: Register subdevices for each entity")

Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: linux-media@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

Signed-off-by: Nadav Amit <namit@xxxxxxxxxx>
---
 drivers/media/usb/uvc/uvc_driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 2469b49b2b30..6b989d41c034 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -909,7 +909,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
 	unsigned int size;
 	unsigned int i;
 
-	extra_size = ALIGN(extra_size, sizeof(*entity->pads));
+	extra_size = roundup(extra_size, sizeof(*entity->pads));
 	num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
 	size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
 	     + num_inputs;
-- 
2.17.0