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authorMajunath Goudar <csmanjuvijay@gmail.com>2013-11-13 17:40:16 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-08 17:53:17 -0800
commite1bffbf622ebceff411fef4970f0fa6326b45830 (patch)
treeba6726deef0c6d9e1f66b59a7aa6b0a4fbcd0eb2
parentf625099f1a504742aef4c6ab20ba0ca981847e3c (diff)
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 <csmanjuvijay@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: linux-usb@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/usb/host/ohci-hcd.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index c8e0e7637b7b..3586460fb2a1 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1026,6 +1026,7 @@ int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
+ int rc = 0;
/* Disable irq emission and mark HW unaccessible. Use
* the spinlock to properly synchronize with possible pending
@@ -1038,7 +1039,13 @@ int ohci_suspend(struct usb_hcd *hcd, bool do_wakeup)
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irqrestore (&ohci->lock, flags);
- return 0;
+ synchronize_irq(hcd->irq);
+
+ if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
+ ohci_resume(hcd, false);
+ rc = -EBUSY;
+ }
+ return rc;
}
EXPORT_SYMBOL_GPL(ohci_suspend);