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authorTomoya MORINAGA <tomoya.rohm@gmail.com>2012-01-12 11:27:07 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-04-22 15:31:13 -0700
commita201b074bf85bca4e37497c0b042ce7ae6096101 (patch)
tree3497706c0da74f5df117f287458447697f5de5c0
parent9fe9ba7c3596a95bf05f30d70a39c89dceb80dd0 (diff)
usb: gadget: pch_udc: Fix USB suspend issue
commit 84566abba058b2aae8d603dfa90b5a3778a6714f upstream. ISSUE: After USB Suspend, a system rarely freezes. CAUSE: When USB Suspend occurred, the driver is not notifying a gadget of the event. Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/usb/gadget/pch_udc.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
index 8080780bd2ff..87ba9cb44446 100644
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -2475,8 +2475,15 @@ static void pch_udc_dev_isr(struct pch_udc_dev *dev, u32 dev_intr)
if (dev_intr & UDC_DEVINT_SC)
pch_udc_svc_cfg_interrupt(dev);
/* USB Suspend interrupt */
- if (dev_intr & UDC_DEVINT_US)
+ if (dev_intr & UDC_DEVINT_US) {
+ if (dev->driver
+ && dev->driver->suspend) {
+ spin_unlock(&dev->lock);
+ dev->driver->suspend(&dev->gadget);
+ spin_lock(&dev->lock);
+ }
dev_dbg(&dev->pdev->dev, "USB_SUSPEND\n");
+ }
/* Clear the SOF interrupt, if enabled */
if (dev_intr & UDC_DEVINT_SOF)
dev_dbg(&dev->pdev->dev, "SOF\n");