block: don't try Write Same from __blkdev_issue_zeroout

Write Same can return an error asynchronously if it turns out the
underlying SCSI device does not support Write Same, which makes a
proper fallback to other methods in __blkdev_issue_zeroout impossible.
Thus only issue a Write Same from blkdev_issue_zeroout an don't try it
at all from __blkdev_issue_zeroout as a non-invasive workaround.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout")
Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

path: root/drivers/usb/gadget/function/uvc_video.h

/*
 *	uvc_video.h  --  USB Video Class Gadget driver
 *
 * Copyright (C) 2009-2010
 *		Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *		Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __UVC_VIDEO_H__
#define __UVC_VIDEO_H__

int uvcg_video_pump(struct uvc_video *video);

int uvcg_video_enable(struct uvc_video *video, int enable);

int uvcg_video_init(struct uvc_video *video);

#endif /* __UVC_VIDEO_H__ */