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usb: gadget: pch_udc: Fix USB suspend issue
author
Tomoya MORINAGA
<tomoya.rohm@gmail.com>
Thu, 12 Jan 2012 02:27:07 +0000
(11:27 +0900)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Sun, 22 Apr 2012 22:31:13 +0000
(15:31 -0700)
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>
drivers/usb/gadget/pch_udc.c
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diff --git
a/drivers/usb/gadget/pch_udc.c
b/drivers/usb/gadget/pch_udc.c
index
8080780
..
87ba9cb
100644
(file)
--- 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");