This is a note to let you know that I've just added the patch titled
usb: chipidea: fix nobody cared IRQ when booting with host role
to the 3.12-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-chipidea-fix-nobody-cared-irq-when-booting-with-host-role.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5a1e1456fc633da5291285b1fff75d2a7507375b Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@xxxxxxxxxxxxx>
Date: Thu, 5 Dec 2013 15:20:50 +0800
Subject: usb: chipidea: fix nobody cared IRQ when booting with host role
From: Peter Chen <peter.chen@xxxxxxxxxxxxx>
commit 5a1e1456fc633da5291285b1fff75d2a7507375b upstream.
If we connect Male-A-To-Male-A cable between otg-host and host pc,
the ci->vbus_active is set wrongly, and cause the controller run
at peripheral mode when we load gadget module (ci_udc_start will be run),
but the software runs at host mode due to id = 0. The ehci_irq
can't handle suspend (USBi_SLI) interrupt which is enabled for
peripheral mode, it causes no one will handle irq error.
This patch is needed for 3.12 stable
Acked-by: Michael Grzeschik <mgr@xxxxxxxxxxxxxx>
Reported-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Tested-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/chipidea/core.c | 4 ++++
drivers/usb/chipidea/udc.c | 3 ---
2 files changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -575,6 +575,10 @@ static int ci_hdrc_probe(struct platform
: CI_ROLE_GADGET;
}
+ /* only update vbus status for peripheral */
+ if (ci->role == CI_ROLE_GADGET)
+ ci_handle_vbus_change(ci);
+
ret = ci_role_start(ci, ci->role);
if (ret) {
dev_err(dev, "can't start %s role\n", ci_role(ci)->name);
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1818,9 +1818,6 @@ static int udc_start(struct ci_hdrc *ci)
pm_runtime_no_callbacks(&ci->gadget.dev);
pm_runtime_enable(&ci->gadget.dev);
- /* Update ci->vbus_active */
- ci_handle_vbus_change(ci);
-
return retval;
remove_trans:
Patches currently in stable-queue which might be from peter.chen@xxxxxxxxxxxxx are
queue-3.12/usb-chipidea-fix-nobody-cared-irq-when-booting-with-host-role.patch
queue-3.12/usb-chipidea-host-only-disable-the-vbus-regulator-if-it-is-not-null.patch
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