media: uvcvideo: Fix uvc_alloc_entity() allocation alignment

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")
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 0692017f0b80ff0403db3ee29b3221d2a5a225fd..21b0270067c104590ae6c4939ab8263a24d7a941 100644 (file)
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -914,7 +914,7 @@ 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;