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USB: OHCI: Properly handle OHCI controller suspend
Suspend scenario in case of OHCI was not properly handled in ochi_suspend()routine. Alan Stern suggested, properly handle OHCI suspend scenario. This does generic proper handling of suspend scenario to all OHCI SOC. Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org> Signed-off-by: Manjunath Goudar <csmanjuvijay@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1036,6 +1036,7 @@ int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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unsigned long flags;
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int rc = 0;
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/* Disable irq emission and mark HW unaccessible. Use
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* the spinlock to properly synchronize with possible pending
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@ -1048,7 +1049,13 @@ int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
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clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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spin_unlock_irqrestore (&ohci->lock, flags);
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return 0;
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synchronize_irq(hcd->irq);
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if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
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ohci_resume(hcd, false);
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rc = -EBUSY;
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}
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return rc;
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}
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EXPORT_SYMBOL_GPL(ohci_suspend);
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