diff options
| author | Alek Du <alek.du@intel.com> | 2010-01-19 09:31:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-02-17 00:11:04 +0100 |
| commit | b9df794258de24d10b0616634d4c30d8b6e9d381 (patch) | |
| tree | ffcbe403b41528f687ad71038c737f2d7a8d550a /drivers/usb | |
| parent | USB: s3c-hsotg: Export usb_gadget_register_driver() (diff) | |
| download | linux-b9df794258de24d10b0616634d4c30d8b6e9d381.tar.xz linux-b9df794258de24d10b0616634d4c30d8b6e9d381.zip | |
USB: ehci: phy low power mode bug fixing
1. There are two msleep calls inside two spin lock sections, need to unlock
and lock again after msleep.
2. Save a extra status reg setting.
Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index c75d9270c752..19372673bf09 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -196,7 +196,9 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) if (hostpc_reg) { u32 t3; + spin_unlock_irq(&ehci->lock); msleep(5);/* 5ms for HCD enter low pwr mode */ + spin_lock_irq(&ehci->lock); t3 = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); t3 = ehci_readl(ehci, hostpc_reg); @@ -904,17 +906,18 @@ static int ehci_hub_control ( if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) goto error; - ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); + /* After above check the port must be connected. * Set appropriate bit thus could put phy into low power * mode if we have hostpc feature */ + temp &= ~PORT_WKCONN_E; + temp |= PORT_WKDISC_E | PORT_WKOC_E; + ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); if (hostpc_reg) { - temp &= ~PORT_WKCONN_E; - temp |= (PORT_WKDISC_E | PORT_WKOC_E); - ehci_writel(ehci, temp | PORT_SUSPEND, - status_reg); + spin_unlock_irqrestore(&ehci->lock, flags); msleep(5);/* 5ms for HCD enter low pwr mode */ + spin_lock_irqsave(&ehci->lock, flags); temp1 = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp1 | HOSTPC_PHCD, hostpc_reg); |