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Subject[PATCH 3/6 v2] usb/gadget/pch_udc: Fix USB suspend issue
Date
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>
---
V2: Divide into 6 patches
---
drivers/usb/gadget/pch_udc.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
index 78a2fce..6cd9e21 100644
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -2480,8 +2480,15 @@ 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");
--
1.7.4.4


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