Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-18 01:51:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

qmi_wwan: set FLAG_SEND_ZLP to avoid network initiated disconnect

Browse Source 
It has been reported that the dummy byte we add to avoid
ZLPs can be forwarded by the modem to the PGW/GGSN, and that
some operators will drop the connection if this happens.

In theory, QMI devices are based on CDC ECM and should as such
both support ZLPs and silently ignore the dummy byte.  The latter
assumption failed.  Let's test out the first.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bjørn Mork 2017-12-14 19:55:50 +01:00 committed by David S. Miller
parent 82f67bc6be
commit 245d21190a
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/usb/qmi_wwan.c
View File

@ -826,7 +826,7 @@ err:
static const struct driver_info qmi_wwan_info = {
.description = "WWAN/QMI device",
.flags = FLAG_WWAN,
.flags = FLAG_WWAN | FLAG_SEND_ZLP,
.bind = qmi_wwan_bind,
.unbind = qmi_wwan_unbind,
.manage_power = qmi_wwan_manage_power,
@ -835,7 +835,7 @@ static const struct driver_info qmi_wwan_info = {
static const struct driver_info qmi_wwan_info_quirk_dtr = {
.description = "WWAN/QMI device",
.flags = FLAG_WWAN,
.flags = FLAG_WWAN | FLAG_SEND_ZLP,
.bind = qmi_wwan_bind,
.unbind = qmi_wwan_unbind,
.manage_power = qmi_wwan_manage_power,