This is a note to let you know that I've just added the patch titled
usb: gadget: udc-core: stop UDC on device-initiated disconnect
to the 3.3-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-udc-core-stop-udc-on-device-initiated-disconnect.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6d258a4c42089229b855fd706622029decf316d6 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <[email protected]>
Date: Thu, 15 Mar 2012 16:37:18 +0200
Subject: usb: gadget: udc-core: stop UDC on device-initiated disconnect
From: Felipe Balbi <[email protected]>
commit 6d258a4c42089229b855fd706622029decf316d6 upstream.
When we want to do device-initiated disconnect,
let's make sure we stop the UDC in order to
e.g. allow lower power states to be achieved by
turning off unnecessary clocks and/or stoping
PHYs.
When reconnecting, call ->udc_start() again to
make sure UDC is reinitialized.
Signed-off-by: Felipe Balbi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/gadget/udc-core.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -359,8 +359,12 @@ static ssize_t usb_udc_softconn_store(st
struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
if (sysfs_streq(buf, "connect")) {
+ if (udc_is_newstyle(udc))
+ usb_gadget_udc_start(udc->gadget, udc->driver);
usb_gadget_connect(udc->gadget);
} else if (sysfs_streq(buf, "disconnect")) {
+ if (udc_is_newstyle(udc))
+ usb_gadget_udc_stop(udc->gadget, udc->driver);
usb_gadget_disconnect(udc->gadget);
} else {
dev_err(dev, "unsupported command '%s'\n", buf);
Patches currently in stable-queue which might be from [email protected] are
queue-3.3/usb-gadget-eliminate-null-pointer-dereference-bugfix.patch
queue-3.3/usb-gadget-udc-core-fix-asymmetric-calls-in-remove_driver.patch
queue-3.3/usb-musb-omap-fix-crash-when-musb-glue-omap-gets-initialized.patch
queue-3.3/usb-gadget-udc-core-stop-udc-on-device-initiated-disconnect.patch
queue-3.3/usb-musb-omap-fix-the-error-check-for-pm_runtime_get_sync.patch
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