This is a note to let you know that I've just added the patch titled
usb: gadget: pch_udc: Fix USB suspend issue
to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-gadget-pch_udc-fix-usb-suspend-issue.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 84566abba058b2aae8d603dfa90b5a3778a6714f Mon Sep 17 00:00:00 2001
From: Tomoya MORINAGA <[email protected]>
Date: Thu, 12 Jan 2012 11:27:07 +0900
Subject: usb: gadget: pch_udc: Fix USB suspend issue
From: Tomoya MORINAGA <[email protected]>
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 <[email protected]>
Signed-off-by: Felipe Balbi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/gadget/pch_udc.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- 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_u
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");
Patches currently in stable-queue which might be from [email protected] are
queue-3.2/usb-gadget-pch_udc-fix-usb-suspend-issue.patch
queue-3.2/pch_uart-fix-msi-setting-issue.patch
queue-3.2/gpio-add-missing-spin_lock_init-in-gpio-pch-driver.patch
queue-3.2/usb-gadget-pch_udc-fix-wrong-return-value.patch
queue-3.2/usb-gadget-pch_udc-fix-usb-gadget-pch_udc-fix-ether.patch
queue-3.2/usb-gadget-pch_udc-fix-disconnect-issue.patch
queue-3.2/usb-gadget-pch_udc-reduce-redundant-interrupt.patch
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