diff options
author | Oliver Neukum <oneukum@suse.de> | 2007-01-16 09:47:12 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-02-07 15:44:35 -0800 |
commit | b98b98f97c519894c64bf1bee6b7957e687dfc41 (patch) | |
tree | 98b591e3e7a08dfc9d474f1661a3baba2df761ca /drivers/usb/net/kaweth.c | |
parent | 511779fd9eb7ed67116e4a1cad802363d2d58b20 (diff) |
USB: power management for kaweth
- implements suspend when the network interface is down
- fixes a typo in comments
- adds debugging output for power management
- fixes a compiler warning
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/net/kaweth.c')
-rw-r--r-- | drivers/usb/net/kaweth.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/usb/net/kaweth.c b/drivers/usb/net/kaweth.c index fa78326d0bf..f29eed30e4f 100644 --- a/drivers/usb/net/kaweth.c +++ b/drivers/usb/net/kaweth.c @@ -179,6 +179,7 @@ static struct usb_driver kaweth_driver = { .suspend = kaweth_suspend, .resume = kaweth_resume, .id_table = usb_klsi_table, + .supports_autosuspend = 1, }; typedef __u8 eth_addr_t[6]; @@ -225,6 +226,7 @@ struct kaweth_device struct delayed_work lowmem_work; struct usb_device *dev; + struct usb_interface *intf; struct net_device *net; wait_queue_head_t term_wait; @@ -662,9 +664,14 @@ static int kaweth_open(struct net_device *net) dbg("Opening network device."); + res = usb_autopm_get_interface(kaweth->intf); + if (res) { + err("Interface cannot be resumed."); + return -EIO; + } res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); if (res) - return -EIO; + goto err_out; usb_fill_int_urb( kaweth->irq_urb, @@ -681,7 +688,7 @@ static int kaweth_open(struct net_device *net) res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); if (res) { usb_kill_urb(kaweth->rx_urb); - return -EIO; + goto err_out; } kaweth->opened = 1; @@ -689,10 +696,14 @@ static int kaweth_open(struct net_device *net) kaweth_async_set_rx_mode(kaweth); return 0; + +err_out: + usb_autopm_enable(kaweth->intf); + return -EIO; } /**************************************************************** - * kaweth_close + * kaweth_kill_urbs ****************************************************************/ static void kaweth_kill_urbs(struct kaweth_device *kaweth) { @@ -724,6 +735,8 @@ static int kaweth_close(struct net_device *net) kaweth->status &= ~KAWETH_STATUS_CLOSING; + usb_autopm_enable(kaweth->intf); + return 0; } @@ -908,6 +921,7 @@ static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) struct kaweth_device *kaweth = usb_get_intfdata(intf); unsigned long flags; + dbg("Suspending device"); spin_lock_irqsave(&kaweth->device_lock, flags); kaweth->status |= KAWETH_STATUS_SUSPENDING; spin_unlock_irqrestore(&kaweth->device_lock, flags); @@ -924,6 +938,7 @@ static int kaweth_resume(struct usb_interface *intf) struct kaweth_device *kaweth = usb_get_intfdata(intf); unsigned long flags; + dbg("Resuming device"); spin_lock_irqsave(&kaweth->device_lock, flags); kaweth->status &= ~KAWETH_STATUS_SUSPENDING; spin_unlock_irqrestore(&kaweth->device_lock, flags); @@ -1086,6 +1101,8 @@ err_fw: dbg("Initializing net device."); + kaweth->intf = intf; + kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); if (!kaweth->tx_urb) goto err_free_netdev; @@ -1265,7 +1282,7 @@ static int kaweth_internal_control_msg(struct usb_device *usb_dev, { struct urb *urb; int retv; - int length; + int length = 0; /* shut up GCC */ urb = usb_alloc_urb(0, GFP_NOIO); if (!urb) |