netdev - [PATCH 1/1] net: usb: cdc_mbim: add flag FLAG_SEND

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Message-Id: <1527758309-9614-1-git-send-email-dnlplm@gmail.com>
Date:   Thu, 31 May 2018 11:18:29 +0200
From:   Daniele Palmas <dnlplm@...il.com>
To:     Bjørn Mork <bjorn@...k.no>,
        Oliver Neukum <oliver@...kum.org>
Cc:     netdev@...r.kernel.org, linux-usb@...r.kernel.org,
        Daniele Palmas <dnlplm@...il.com>
Subject: [PATCH 1/1] net: usb: cdc_mbim: add flag FLAG_SEND_ZLP

Testing Telit LM940 with ICMP packets > 14552 bytes revealed that
the modem needs FLAG_SEND_ZLP to properly work, otherwise the cdc
mbim data interface won't be anymore responsive.

Signed-off-by: Daniele Palmas <dnlplm@...il.com>
---
 drivers/net/usb/cdc_mbim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/cdc_mbim.c b/drivers/net/usb/cdc_mbim.c
index 7220cd6..0362acd 100644
--- a/drivers/net/usb/cdc_mbim.c
+++ b/drivers/net/usb/cdc_mbim.c
@@ -609,7 +609,7 @@ static const struct driver_info cdc_mbim_info_ndp_to_end = {
  */
 static const struct driver_info cdc_mbim_info_avoid_altsetting_toggle = {
 	.description = "CDC MBIM",
-	.flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN,
+	.flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN | FLAG_SEND_ZLP,
 	.bind = cdc_mbim_bind,
 	.unbind = cdc_mbim_unbind,
 	.manage_power = cdc_mbim_manage_power,
-- 
2.7.4