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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2016-01-06 15:10:04 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-24 21:06:21 -0800 |
| commit | ffdb1e369a73b380fce95b05f8498d92c43842b4 (patch) | |
| tree | 93d4c35376045b1fa564b42d8883af4ce6bef697 /drivers/usb/class/cdc-acm.c | |
| parent | 19454462acb1bdef80542061bdc9b410e4ed1ff6 (diff) | |
| download | linux-ffdb1e369a73b380fce95b05f8498d92c43842b4.tar.gz linux-ffdb1e369a73b380fce95b05f8498d92c43842b4.tar.bz2 linux-ffdb1e369a73b380fce95b05f8498d92c43842b4.zip | |
usb: cdc-acm: send zero packet for intel 7260 modem
For Intel 7260 modem, it is needed for host side to send zero
packet if the BULK OUT size is equal to USB endpoint max packet
length. Otherwise, modem side may still wait for more data and
cannot give response to host side.
Signed-off-by: Konrad Leszczynski <konrad.leszczynski@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 8cd193bbd044..e4c70dce3e7c 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1405,6 +1405,8 @@ made_compressed_probe: usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress), NULL, acm->writesize, acm_write_bulk, snd); snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + if (quirks & SEND_ZERO_PACKET) + snd->urb->transfer_flags |= URB_ZERO_PACKET; snd->instance = acm; } @@ -1862,6 +1864,10 @@ static const struct usb_device_id acm_ids[] = { { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, USB_CDC_ACM_PROTO_AT_CDMA) }, + { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ + .driver_info = SEND_ZERO_PACKET, + }, + { } }; |