diff options
| author |   Oliver Neukum <oneukum@suse.de> | 2014-07-28 10:56:36 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-07-29 12:22:15 -0700 |
| commit | c472ab68ad67db23c9907a27649b7dc0899b61f9 (patch) | |
| tree | 862b12f48c1457d0eca5f147e2546ac36a7f412f /drivers/net/usb/cdc_ether.c | |
| parent | cdc_subset: deal with a device that needs reset for timeout (diff) | |
| download | linux-dev-c472ab68ad67db23c9907a27649b7dc0899b61f9.tar.xz linux-dev-c472ab68ad67db23c9907a27649b7dc0899b61f9.zip | |
cdc-ether: clean packet filter upon probe
There are devices that don't do reset all the way. So the packet filter should
be set to a sane initial value. Failure to do so leads to intermittent failures
of DHCP on some systems under some conditions.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/cdc_ether.c')
| -rw-r--r-- | drivers/net/usb/cdc_ether.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c index 9ea4bfe5d318..2a32d9167d3b 100644 --- a/drivers/net/usb/cdc_ether.c +++ b/drivers/net/usb/cdc_ether.c @@ -341,6 +341,22 @@ next_desc: usb_driver_release_interface(driver, info->data); return -ENODEV; } + + /* Some devices don't initialise properly. In particular + * the packet filter is not reset. There are devices that + * don't do reset all the way. So the packet filter should + * be set to a sane initial value. + */ + usb_control_msg(dev->udev, + usb_sndctrlpipe(dev->udev, 0), + USB_CDC_SET_ETHERNET_PACKET_FILTER, + USB_TYPE_CLASS | USB_RECIP_INTERFACE, + USB_CDC_PACKET_TYPE_ALL_MULTICAST | USB_CDC_PACKET_TYPE_DIRECTED | USB_CDC_PACKET_TYPE_BROADCAST, + intf->cur_altsetting->desc.bInterfaceNumber, + NULL, + 0, + USB_CTRL_SET_TIMEOUT + ); return 0; bad_desc: |