diff options
| author | Oliver Neukum <oliver@neukum.org> | 2012-10-11 02:50:10 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-11 15:19:21 -0400 |
| commit | 5d9d01a30204c99edf99189018953ee84c5f5017 (patch) | |
| tree | 3bb2f17fca9de90c003dd1ab37a017299414733d /drivers | |
| parent | e7d491a19d3e3aac544070293891a2542ae0c565 (diff) | |
| download | lwn-5d9d01a30204c99edf99189018953ee84c5f5017.tar.gz lwn-5d9d01a30204c99edf99189018953ee84c5f5017.zip | |
usbnet: Support devices reporting idleness
Some device types support a form of power management in which
the device suggests to the host that the device may be suspended
now. Support for that is best located in usbnet.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/usb/cdc_eem.c | 4 | ||||
| -rw-r--r-- | drivers/net/usb/usbnet.c | 17 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/usb/cdc_eem.c b/drivers/net/usb/cdc_eem.c index 434d5af8e6fb..c81e278629ff 100644 --- a/drivers/net/usb/cdc_eem.c +++ b/drivers/net/usb/cdc_eem.c @@ -244,8 +244,12 @@ static int eem_rx_fixup(struct usbnet *dev, struct sk_buff *skb) * - suspend: peripheral ready to suspend * - response: suggest N millisec polling * - response complete: suggest N sec polling + * + * Suspend is reported and maybe heeded. */ case 2: /* Suspend hint */ + usbnet_device_suggests_idle(dev); + continue; case 3: /* Response hint */ case 4: /* Response complete hint */ continue; diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index fc9f578a1e25..f9819d10b1f9 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1588,10 +1588,27 @@ int usbnet_resume (struct usb_interface *intf) tasklet_schedule (&dev->bh); } } + + if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) + usb_autopm_get_interface_no_resume(intf); + return 0; } EXPORT_SYMBOL_GPL(usbnet_resume); +/* + * Either a subdriver implements manage_power, then it is assumed to always + * be ready to be suspended or it reports the readiness to be suspended + * explicitly + */ +void usbnet_device_suggests_idle(struct usbnet *dev) +{ + if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { + dev->intf->needs_remote_wakeup = 1; + usb_autopm_put_interface_async(dev->intf); + } +} +EXPORT_SYMBOL(usbnet_device_suggests_idle); /*-------------------------------------------------------------------------*/ |