USB: OHCI: Properly handle ohci-exynos suspend

Suspend scenario in case of ohci-exynos glue was not
properly handled as it was not suspending generic part
of ohci controller. Alan Stern suggested, properly handle
ohci-exynos suspend scenario.

Calling explicitly the ohci_suspend() routine in
exynos_ohci_suspend() will ensure proper handling of suspend
scenario.

Signed-off-by: Manjunath Goudar <csmanjuvijay@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 91ec9b2cd37868f600eca4dd41cdf6180eed806e..9897d70e4c152c8985fecfdc9049a24cab2f0db1 100644 (file)
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -191,23 +191,14 @@ static int exynos_ohci_suspend(struct device *dev)
        struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
        struct platform_device *pdev = to_platform_device(dev);
+       bool do_wakeup = device_may_wakeup(dev);
        unsigned long flags;
-       int rc = 0;
+       int rc = ohci_suspend(hcd, do_wakeup);
 
-       /*
-        * Root hub was already suspended. Disable irq emission and
-        * mark HW unaccessible, bail out if RH has been resumed. Use
-        * the spinlock to properly synchronize with possible pending
-        * RH suspend or resume activity.
-        */
-       spin_lock_irqsave(&ohci->lock, flags);
-       if (ohci->rh_state != OHCI_RH_SUSPENDED &&
-                       ohci->rh_state != OHCI_RH_HALTED) {
-               rc = -EINVAL;
-               goto fail;
-       }
+       if (rc)
+               return rc;
 
-       clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+       spin_lock_irqsave(&ohci->lock, flags);
 
        if (exynos_ohci->otg)
                exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
@@ -216,10 +207,9 @@ static int exynos_ohci_suspend(struct device *dev)
 
        clk_disable_unprepare(exynos_ohci->clk);
 
-fail:
        spin_unlock_irqrestore(&ohci->lock, flags);
 
-       return rc;
+       return 0;
 }
 
 static int exynos_ohci_resume(struct device *dev)