Hi,
From the ehci-hub.c, I find that ehci_bus_suspend/resume have some
code like this:
if (time_before(jiffies, ehci->netx_statechange))
msleep(5);
...
ehci->next_statechange = jiffies + msec_to_jiffies(10);
and
if (time_before(jiffies, ehci->netx_statechange))
msleep(5);
...
ehci->next_statechange = jiffies + msec_to_jiffies(5);
but I don't know why such a short sleep is needed, and why one is
[ehci->next_statechange = jiffies + msec_to_jiffies(10)] and the other is
[ehci->next_statechange = jiffies + msec_to_jiffies(5)],
I googled for a long time, but it seems that there is no explanation.
Anyone knows why and can give any explanation?
Thanks very much!
Best Regards!
ShiJinghui