This is a note to let you know that I've just added the patch titled
usb: gadget: pch_udc: Fix disconnect 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-disconnect-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 c50a3bff0edb0acd49d8033a12ea4668e09a31ad Mon Sep 17 00:00:00 2001
From: Tomoya MORINAGA <[email protected]>
Date: Thu, 12 Jan 2012 11:27:05 +0900
Subject: usb: gadget: pch_udc: Fix disconnect issue
From: Tomoya MORINAGA <[email protected]>
commit c50a3bff0edb0acd49d8033a12ea4668e09a31ad upstream.
ISSUE:
When the driver notifies a gadget of a disconnect event, a system
rarely freezes.
CAUSE:
When the driver calls dev->driver->disconnect(), it is not calling
spin_unlock().
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 | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -2335,8 +2335,11 @@ static void pch_udc_svc_ur_interrupt(str
/* Complete request queue */
empty_req_queue(ep);
}
- if (dev->driver && dev->driver->disconnect)
+ if (dev->driver && dev->driver->disconnect) {
+ spin_unlock(&dev->lock);
dev->driver->disconnect(&dev->gadget);
+ spin_lock(&dev->lock);
+ }
}
/**
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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