[PATCH V4 10/11] USB: OHCI: Properly handle ohci-sm501 suspend

[Manjunath Goudar]

Suspend scenario in case of ohci-sm501 glue was not
properly handled as it was not suspending generic part
of ohci controller. Calling explicitly the ohci_suspend()
routine in ohci_sm501_suspend() will ensure proper
handling of suspend scenario.

Signed-off-by: Manjunath Goudar <manjunath.goudar at linaro.org>
Acked-by: Alan Stern <stern at rowland.harvard.edu>
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Greg KH <greg at kroah.com>
Cc: linux-usb at vger.kernel.org

V2:
 -Incase ohci_suspend() fails, return right away without
  executing further.
V3:
 -Aligned variable "do_wakeup" and "ret".

-V4:
 -The do_wakeup and ret variable alignment is removed.
---
 drivers/usb/host/ohci-sm501.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ohci-sm501.c b/drivers/usb/host/ohci-sm501.c
index d479d5d..2a5de5f 100644
--- a/drivers/usb/host/ohci-sm501.c
+++ b/drivers/usb/host/ohci-sm501.c
@@ -216,14 +216,21 @@ static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
 static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
 {
 	struct device *dev = &pdev->dev;
-	struct ohci_hcd	*ohci = hcd_to_ohci(platform_get_drvdata(pdev));
+	struct usb_hcd  *hcd = platform_get_drvdata(pdev);
+	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
+	bool do_wakeup = device_may_wakeup(dev);
+	int ret;
 
 	if (time_before(jiffies, ohci->next_statechange))
 		msleep(5);
 	ohci->next_statechange = jiffies;
 
+	ret = ohci_suspend(hcd, do_wakeup);
+	if (ret)
+		return ret;
+
 	sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
-	return 0;
+	return ret;
 }
 
 static int ohci_sm501_resume(struct platform_device *pdev)
-- 
1.7.9.5