[PATCH 26/28] staging: most: usb: don't set URB_ZERO_PACKET flag for synchronous data

[Christian Gromm]

This patch avoids setting the URB_ZERO_PACKET transfer flag for synchronous
data. This is needed to prevent the host from sending an empty packet when
data is aligned to an endpoint packet boundary.

Signed-off-by: Christian Gromm <christian.gromm at microchip.com>
---
 drivers/staging/most/usb/usb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/most/usb/usb.c b/drivers/staging/most/usb/usb.c
index 3126b69..d102b08 100644
--- a/drivers/staging/most/usb/usb.c
+++ b/drivers/staging/most/usb/usb.c
@@ -592,7 +592,8 @@ static int hdm_enqueue(struct most_interface *iface, int channel,
 				  length,
 				  hdm_write_completion,
 				  mbo);
-		if (conf->data_type != MOST_CH_ISOC)
+		if (conf->data_type != MOST_CH_ISOC &&
+		    conf->data_type != MOST_CH_SYNC)
 			urb->transfer_flags |= URB_ZERO_PACKET;
 	} else {
 		usb_fill_bulk_urb(urb, mdev->usb_device,
-- 
2.7.4