This patch (as1650) adds calls to the new
usb_hcd_{start,end}_port_resume() functions to ehci-hcd. Now EHCI
root hubs won't be runtime suspended while they are sending a resume
signal to one of their ports.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Tested-by: Ming Lei <ming.lei@xxxxxxxxxxxxx>
---
drivers/usb/host/ehci-hcd.c | 1 +
drivers/usb/host/ehci-hub.c | 3 +++
2 files changed, 4 insertions(+)
Index: usb-3.8/drivers/usb/host/ehci-hcd.c
===================================================================
--- usb-3.8.orig/drivers/usb/host/ehci-hcd.c
+++ usb-3.8/drivers/usb/host/ehci-hcd.c
@@ -797,6 +797,7 @@ static irqreturn_t ehci_irq (struct usb_
ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
set_bit(i, &ehci->resuming_ports);
ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
+ usb_hcd_start_port_resume(&hcd->self, i);
mod_timer(&hcd->rh_timer, ehci->reset_done[i]);
}
}
Index: usb-3.8/drivers/usb/host/ehci-hub.c
===================================================================
--- usb-3.8.orig/drivers/usb/host/ehci-hub.c
+++ usb-3.8/drivers/usb/host/ehci-hub.c
@@ -851,6 +851,7 @@ static int ehci_hub_control (
/* resume signaling for 20 msec */
ehci->reset_done[wIndex] = jiffies
+ msecs_to_jiffies(20);
+ usb_hcd_start_port_resume(&hcd->self, wIndex);
/* check the port again */
mod_timer(&ehci_to_hcd(ehci)->rh_timer,
ehci->reset_done[wIndex]);
@@ -862,6 +863,7 @@ static int ehci_hub_control (
clear_bit(wIndex, &ehci->suspended_ports);
set_bit(wIndex, &ehci->port_c_suspend);
ehci->reset_done[wIndex] = 0;
+ usb_hcd_end_port_resume(&hcd->self, wIndex);
/* stop resume signaling */
temp = ehci_readl(ehci, status_reg);
@@ -950,6 +952,7 @@ static int ehci_hub_control (
ehci->reset_done[wIndex] = 0;
if (temp & PORT_PE)
set_bit(wIndex, &ehci->port_c_suspend);
+ usb_hcd_end_port_resume(&hcd->self, wIndex);
}
if (temp & PORT_OC)
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
