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authorBjørn Mork <bjorn@mork.no>2013-01-21 09:50:39 +0400
committerDavid S. Miller <davem@davemloft.net>2013-01-21 23:21:17 +0400
commit328d7b8a4ab045484e1cc09579abf13c8c6223e3 (patch)
tree00d6ceae423e5d20aa353c78c2ecfa98d25f1af8 /drivers/net/usb/cdc_mbim.c
parent9992c2e2fbb72ffc63d4587c4aa94dfcd8229e55 (diff)
downloadlinux-328d7b8a4ab045484e1cc09579abf13c8c6223e3.tar.xz
net: cdc_mbim: send ZLP after max sized NTBs
We normally avoid sending ZLPs by padding NTBs with a zero byte if the NTB is shorter than dwNtbOutMaxSize, resulting in a short USB packet instead of a ZLP. But in the case where the NTB length is exactly dwNtbOutMaxSize and this is an exact multiplum of wMaxPacketSize, then we must send a ZLP. This fixes an issue seen on a Sierra Wireless MC7710 device where the transmission would fail whenever we ended up padding the NTBs to max size. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/cdc_mbim.c')
-rw-r--r--drivers/net/usb/cdc_mbim.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/usb/cdc_mbim.c b/drivers/net/usb/cdc_mbim.c
index 42f51c71ec1f..3a5673aa1c37 100644
--- a/drivers/net/usb/cdc_mbim.c
+++ b/drivers/net/usb/cdc_mbim.c
@@ -366,7 +366,7 @@ err:
static const struct driver_info cdc_mbim_info = {
.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,