usb: why we need a msleep(5) in ehci_bus_suspend/resume

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->ne

why we need a msleep(5) in ehci_bus_suspend/resume

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->ne