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Commit 4772c018 authored by Ian Abbott's avatar Ian Abbott Committed by Greg Kroah-Hartman
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Staging: comedi: COMEDI_BUFINFO with no async - report no bytes read or written 



When the COMEDI_BUFINFO ioctl is used on a subdevice without
asynchronous streaming command support, set 'bytes_read = 0' and
'bytes_written = 0' in the buffer info returned back to the user.

Signed-off-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent d2611540

drivers/staging/comedi/comedi_fops.c

+2 −0
Original line number Diff line number Diff line
@@ -584,6 +584,8 @@ static int do_bufinfo_ioctl(struct comedi_device *dev, 
		bi.buf_read_ptr = 0;

		bi.buf_write_count = 0;

		bi.buf_read_count = 0;

		bi.bytes_read = 0;

		bi.bytes_written = 0;

		goto copyback;

	}