[RFT] testers for CDC-EEM devices wanted
From: Oliver Neukum <oliver@neukum.org>
Date: 2012-08-27 07:24:19
Subsystem:
networking drivers, the rest, usb "usbnet" driver framework, usb cdc ethernet driver, usb networking drivers, usb subsystem · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Oliver Neukum, Oliver Neukum, Greg Kroah-Hartman
Hi, I am looking for people who have a cdc-eem device that emits power management hints and would be willig to test this patch. Regards Oliver
From 499bcc977f13b899cd49a6474843ed3c9086cc0b Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oliver@neukum.org> Date: Sun, 26 Aug 2012 17:12:06 +0200 Subject: [PATCH] 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 <redacted> --- drivers/net/usb/cdc_eem.c | 4 ++++ drivers/net/usb/usbnet.c | 17 +++++++++++++++++ include/linux/usb/usbnet.h | 2 ++ 3 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/net/usb/cdc_eem.c b/drivers/net/usb/cdc_eem.c
index 434d5af..c81e278 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 fd4b26d..38c534a 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c@@ -1580,10 +1580,27 @@ 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); /*-------------------------------------------------------------------------*/
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index f87cf62..ddbbb7d 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h@@ -68,6 +68,7 @@ struct usbnet { # define EVENT_RX_PAUSED 5 # define EVENT_DEV_ASLEEP 6 # define EVENT_DEV_OPEN 7 +# define EVENT_DEVICE_REPORT_IDLE 8 }; static inline struct usb_driver *driver_of(struct usb_interface *intf)
@@ -160,6 +161,7 @@ extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *); extern int usbnet_suspend(struct usb_interface *, pm_message_t); extern int usbnet_resume(struct usb_interface *); extern void usbnet_disconnect(struct usb_interface *); +extern void usbnet_device_suggests_idle(struct usbnet *dev); /* Drivers that reuse some of the standard USB CDC infrastructure
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1.7.7