diff options
| author | Oliver Neukum <oliver@neukum.org> | 2012-12-18 05:45:29 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-19 21:46:40 +0100 |
| commit | a1c088e01b71d90852b0df5a77cdae46bd0e0c05 (patch) | |
| tree | 5aa6cae3330418b279d8f77d2bb466f75eee9018 | |
| parent | ksz884x: fix receive polling race condition (diff) | |
| download | linux-a1c088e01b71d90852b0df5a77cdae46bd0e0c05.tar.xz linux-a1c088e01b71d90852b0df5a77cdae46bd0e0c05.zip | |
usbnet: handle PM failure gracefully
If a device fails to do remote wakeup, this is no reason
to abort an open totally. This patch just continues without
runtime PM.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/usb/usbnet.c | 15 | ||||
| -rw-r--r-- | include/linux/usb/usbnet.h | 1 |
2 files changed, 9 insertions, 7 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index c04110ba677f..50ed7ab09c9f 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -719,7 +719,8 @@ int usbnet_stop (struct net_device *net) dev->flags = 0; del_timer_sync (&dev->delay); tasklet_kill (&dev->bh); - if (info->manage_power) + if (info->manage_power && + !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags)) info->manage_power(dev, 0); else usb_autopm_put_interface(dev->intf); @@ -794,14 +795,14 @@ int usbnet_open (struct net_device *net) tasklet_schedule (&dev->bh); if (info->manage_power) { retval = info->manage_power(dev, 1); - if (retval < 0) - goto done_manage_power_error; - usb_autopm_put_interface(dev->intf); + if (retval < 0) { + retval = 0; + set_bit(EVENT_NO_RUNTIME_PM, &dev->flags); + } else { + usb_autopm_put_interface(dev->intf); + } } return retval; - -done_manage_power_error: - clear_bit(EVENT_DEV_OPEN, &dev->flags); done: usb_autopm_put_interface(dev->intf); done_nopm: diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h index 9bbeabf66c54..288b32aadab2 100644 --- a/include/linux/usb/usbnet.h +++ b/include/linux/usb/usbnet.h @@ -69,6 +69,7 @@ struct usbnet { # define EVENT_DEV_ASLEEP 6 # define EVENT_DEV_OPEN 7 # define EVENT_DEVICE_REPORT_IDLE 8 +# define EVENT_NO_RUNTIME_PM 9 }; static inline struct usb_driver *driver_of(struct usb_interface *intf) |