usb: misc: Send zero-length packets on bulk OUT
Set the flag that enables the host controller to send zero-length
packets if the payload size is a multiple of the max packet size
(typically 512 bytes) in order to avoid cases in which the device
may stall while waiting for more data.
CRs-fixed: 373737
Change-Id: I779d00837a12bcd1d7df12b77ac1f1f5aab0fe68
Signed-off-by: Jack Pham <jackp@codeaurora.org>
diff --git a/drivers/net/usb/rmnet_usb_data.c b/drivers/net/usb/rmnet_usb_data.c
index 9e1e252..55020a1 100644
--- a/drivers/net/usb/rmnet_usb_data.c
+++ b/drivers/net/usb/rmnet_usb_data.c
@@ -604,6 +604,7 @@
static const struct driver_info rmnet_info_pid9034 = {
.description = "RmNET net device",
+ .flags = FLAG_SEND_ZLP,
.bind = rmnet_usb_bind,
.tx_fixup = rmnet_usb_tx_fixup,
.rx_fixup = rmnet_usb_rx_fixup,
@@ -613,6 +614,7 @@
static const struct driver_info rmnet_info_pid9048 = {
.description = "RmNET net device",
+ .flags = FLAG_SEND_ZLP,
.bind = rmnet_usb_bind,
.tx_fixup = rmnet_usb_tx_fixup,
.rx_fixup = rmnet_usb_rx_fixup,
@@ -622,6 +624,7 @@
static const struct driver_info rmnet_info_pid904c = {
.description = "RmNET net device",
+ .flags = FLAG_SEND_ZLP,
.bind = rmnet_usb_bind,
.tx_fixup = rmnet_usb_tx_fixup,
.rx_fixup = rmnet_usb_rx_fixup,
diff --git a/drivers/usb/misc/diag_bridge.c b/drivers/usb/misc/diag_bridge.c
index 8b762a2..6d5544a 100644
--- a/drivers/usb/misc/diag_bridge.c
+++ b/drivers/usb/misc/diag_bridge.c
@@ -255,6 +255,7 @@
pipe = usb_sndbulkpipe(dev->udev, dev->out_epAddr);
usb_fill_bulk_urb(urb, dev->udev, pipe, data, size,
diag_bridge_write_cb, dev);
+ urb->transfer_flags |= URB_ZERO_PACKET;
usb_anchor_urb(urb, &dev->submitted);
dev->pending_writes++;
diff --git a/drivers/usb/misc/mdm_data_bridge.c b/drivers/usb/misc/mdm_data_bridge.c
index db2f40a..1c9de07 100644
--- a/drivers/usb/misc/mdm_data_bridge.c
+++ b/drivers/usb/misc/mdm_data_bridge.c
@@ -497,6 +497,8 @@
usb_fill_bulk_urb(txurb, dev->udev, dev->bulk_out,
skb->data, skb->len, data_bridge_write_cb, skb);
+ txurb->transfer_flags |= URB_ZERO_PACKET;
+
if (test_bit(SUSPENDED, &dev->flags)) {
usb_anchor_urb(txurb, &dev->delayed);
goto free_urb;