diff options
| author | Peter Chen <peter.chen@freescale.com> | 2013-12-05 15:20:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:25:08 -0800 |
| commit | bfb4a262bf2ce2b8f7d4f444eb00059b3078bf64 (patch) | |
| tree | 8065c4ca9644d8b282ce2e4442580f3eb1f5eb4a | |
| parent | 811dac78101fa1dda71fe86742cfeefd7ae3bb3a (diff) | |
| download | linux-rt-bfb4a262bf2ce2b8f7d4f444eb00059b3078bf64.tar.gz | |
usb: chipidea: fix nobody cared IRQ when booting with host role
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@pengutronix.de>
Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/chipidea/core.c | 4 | ||||
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 3 |
2 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 23763dcec069..d6a50b7bb4ca 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -575,6 +575,10 @@ static int ci_hdrc_probe(struct platform_device *pdev) : 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); diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 9333083dd111..d98fa254eaaf 100644 --- 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: |