Commit 9a601396 authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
Browse files

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
......@@ -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;
......
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