USB: HCDs use the do_remote_wakeup flag
When a USB device is suspended, whether or not it is enabled for
remote wakeup depends on the device_may_wakeup() setting. The setting
is then saved in the do_remote_wakeup flag.
Later on, however, the device_may_wakeup() value can change because of
user activity. So when testing whether a suspended device is or
should be enabled for remote wakeup, we should always test
do_remote_wakeup instead of device_may_wakeup(). This patch (as1076)
makes that change for root hubs in several places.
The patch also adjusts uhci-hcd so that when an autostopped controller
is suspended, the remote wakeup setting agrees with the value recorded
in the root hub's do_remote_wakeup flag.
And the patch adjusts ehci-hcd so that wakeup events on selectively
suspended ports (i.e., the bus itself isn't suspended) don't turn on
the PME# wakeup signal.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 21ac378..536b433 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -30,6 +30,8 @@
#ifdef CONFIG_PM
+#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
+
static int ehci_hub_control(
struct usb_hcd *hcd,
u16 typeReq,
@@ -149,10 +151,10 @@
}
/* enable remote wakeup on all ports */
- if (device_may_wakeup(&hcd->self.root_hub->dev))
- t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E;
+ if (hcd->self.root_hub->do_remote_wakeup)
+ t2 |= PORT_WAKE_BITS;
else
- t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E);
+ t2 &= ~PORT_WAKE_BITS;
if (t1 != t2) {
ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
@@ -174,7 +176,7 @@
/* allow remote wakeup */
mask = INTR_MASK;
- if (!device_may_wakeup(&hcd->self.root_hub->dev))
+ if (!hcd->self.root_hub->do_remote_wakeup)
mask &= ~STS_PCD;
ehci_writel(ehci, mask, &ehci->regs->intr_enable);
ehci_readl(ehci, &ehci->regs->intr_enable);
@@ -232,8 +234,7 @@
i = HCS_N_PORTS (ehci->hcs_params);
while (i--) {
temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
- temp &= ~(PORT_RWC_BITS
- | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E);
+ temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
if (test_bit(i, &ehci->bus_suspended) &&
(temp & PORT_SUSPEND)) {
ehci->reset_done [i] = jiffies + msecs_to_jiffies (20);
@@ -534,8 +535,6 @@
/*-------------------------------------------------------------------------*/
-#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
-
static int ehci_hub_control (
struct usb_hcd *hcd,
u16 typeReq,
@@ -801,8 +800,6 @@
if ((temp & PORT_PE) == 0
|| (temp & PORT_RESET) != 0)
goto error;
- if (device_may_wakeup(&hcd->self.root_hub->dev))
- temp |= PORT_WAKE_BITS;
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
break;
case USB_PORT_FEAT_POWER:
