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/sound/usb/pcm.h

#ifndef __USBAUDIO_PCM_H
#define __USBAUDIO_PCM_H

snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
				    unsigned int rate);

void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream);

int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
		       struct usb_host_interface *alts,
		       struct audioformat *fmt);


#endif /* __USBAUDIO_PCM_H */