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usbnet: smsc95xx: add reset_resume function with reset operation 

The smsc95xx needs to resume with reset operation. Otherwise it causes
system hang by network error like below after resume. This case appears
on odroid u3 board.

[    9.727600] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
[    9.727648] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
[    9.727689] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
[    9.727728] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
[    9.729486] PM: resume of devices complete after 2011.219 msecs
[   10.117609] Restarting tasks ... done.
[   11.725099] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
[   13.480846] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
[   13.481361] smsc95xx 1-2:1.0 eth0: kevent 2 may have been dropped
...

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Joonyoung Shim 2014-07-10 11:49:42 +09:00 committed by David S. Miller
parent a12f78c582
commit b4df480f68
1 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/usb/smsc95xx.c
View File

@ -1714,6 +1714,18 @@ static int smsc95xx_resume(struct usb_interface *intf)
return ret;
}
static int smsc95xx_reset_resume(struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
int ret;
ret = smsc95xx_reset(dev);
if (ret < 0)
return ret;
return smsc95xx_resume(intf);
}
static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
{
skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
@ -2004,7 +2016,7 @@ static struct usb_driver smsc95xx_driver = {
.probe = usbnet_probe,
.suspend = smsc95xx_suspend,
.resume = smsc95xx_resume,
.reset_resume = smsc95xx_resume,
.reset_resume = smsc95xx_reset_resume,
.disconnect = usbnet_disconnect,
.disable_hub_initiated_lpm = 1,
.supports_autosuspend = 1,