[PATCH 08/27] Staging: comedi: COMEDI_BUFINFO with no async - report no bytes read or written

[Greg Kroah-Hartman]

From: Ian Abbott <abbotti at mev.co.uk>

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: Ian Abbott <abbotti at mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>
---
 drivers/staging/comedi/comedi_fops.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 39ed22b..7525625 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -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;
 	}
 
-- 
1.7.1