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| author | Bjørn Mork <bjorn@mork.no> | 2013-01-21 05:50:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-21 14:21:17 -0500 |
| commit | 328d7b8a4ab045484e1cc09579abf13c8c6223e3 (patch) | |
| tree | 00d6ceae423e5d20aa353c78c2ecfa98d25f1af8 /drivers/net/usb/cdc_mbim.c | |
| parent | 9992c2e2fbb72ffc63d4587c4aa94dfcd8229e55 (diff) | |
| download | lwn-328d7b8a4ab045484e1cc09579abf13c8c6223e3.tar.gz lwn-328d7b8a4ab045484e1cc09579abf13c8c6223e3.zip | |
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.c | 2 |
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, |