3.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Peter Chen <peter.c...@freescale.com>
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 <m...@pengutronix.de>
Reported-by: Marc Kleine-Budde <m...@pengutronix.de>
Tested-by: Marc Kleine-Budde <m...@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <m...@pengutronix.de>
Signed-off-by: Peter Chen <peter.c...@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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:
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
