patch "usb: chipidea: debug: disable usb irq while role switch" added to usb-linus

This is a note to let you know that I've just added the patch titled

usb: chipidea: debug: disable usb irq while role switch

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Li Jun <[email protected]>
Date: Tue, 13 Oct 2015 18:23:31 +0800
Subject: usb: chipidea: debug: disable usb irq while role switch

Since the ci->role will be set after the host role start is complete, there will be nobody cared irq during start host if usb irq enabled. This error can be reproduced on i.mx6 sololite EVK board by:
1. disable otg id irq(IDIE) and disable all real otg properties of usbotg1 in dts.
2. boot up the board with ID cable and usb device connected.
3. echo gadget > /sys/kernel/debug/ci_hdrc.0/role
4. echo host > /sys/kernel/debug/ci_hdrc.0/role
5. irq 212: nobody cared.

---
 drivers/usb/chipidea/debug.c | 2 ++
 1 file changed, 2 insertions(+)

index 080b7be3daf0..58c8485a0715 100644
@@ -322,8 +322,10 @@ static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
 		return -EINVAL;
 
 	pm_runtime_get_sync(ci->dev);
+	disable_irq(ci->irq);
 	ci_role_stop(ci);
 	ret = ci_role_start(ci, role);
+	enable_irq(ci->irq);
 	pm_runtime_put_sync(ci->dev);
 
 	return ret ? ret : count;

2.6.2