diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2008-04-14 20:17:10 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-04-25 08:16:53 +0400 |
| commit | 58a97ffeb2297f154659f339d77eb3f32c4d8b3e (patch) | |
| tree | 2ca171b7f720769007f9c9624b74ca4ad3442f02 /drivers/usb/host/ehci-hub.c | |
| parent | b950bdbc67041412cb042e404938667204c7902c (diff) | |
| download | linux-58a97ffeb2297f154659f339d77eb3f32c4d8b3e.tar.xz | |
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>
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 21ac3781f21a..536b433d24f7 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 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) } /* 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 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) /* 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 @@ static int ehci_bus_resume (struct usb_hcd *hcd) 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 @@ ehci_hub_descriptor ( /*-------------------------------------------------------------------------*/ -#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 @@ static int ehci_hub_control ( 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: |