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Commit 9a601396 authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
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video/uvc: use memweight() 



Use memweight() to count the total number of bits set in memory area.

Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0121ad62

drivers/media/video/uvc/uvc_ctrl.c

+2 −3
Original line number Diff line number Diff line
@@ -2083,7 +2083,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev) 
	/* Walk the entities list and instantiate controls */

	list_for_each_entry(entity, &dev->entities, list) {

		struct uvc_control *ctrl;

		unsigned int bControlSize = 0, ncontrols = 0;

		unsigned int bControlSize = 0, ncontrols;

		__u8 *bmControls = NULL;



		if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
@@ -2101,8 +2101,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev) 
		uvc_ctrl_prune_entity(dev, entity);



		/* Count supported controls and allocate the controls array */

		for (i = 0; i < bControlSize; ++i)

			ncontrols += hweight8(bmControls[i]);

		ncontrols = memweight(bmControls, bControlSize);

		if (ncontrols == 0)

			continue;