diff options
Diffstat (limited to 'drivers/usb/chipidea')
| -rw-r--r-- | drivers/usb/chipidea/core.c | 1 | ||||
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 11 |
2 files changed, 10 insertions, 2 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 965d0e240dcb..ba4a2a1eb3ff 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -926,6 +926,7 @@ static int ci_hdrc_probe(struct platform_device *pdev) if (!ci) return -ENOMEM; + spin_lock_init(&ci->lock); ci->dev = dev; ci->platdata = dev_get_platdata(dev); ci->imx28_write_fix = !!(ci->platdata->flags & diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index ca367b05e440..d8a045fc1fdb 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -939,6 +939,15 @@ static int isr_setup_status_phase(struct ci_hdrc *ci) int retval; struct ci_hw_ep *hwep; + /* + * Unexpected USB controller behavior, caused by bad signal integrity + * or ground reference problems, can lead to isr_setup_status_phase + * being called with ci->status equal to NULL. + * If this situation occurs, you should review your USB hardware design. + */ + if (WARN_ON_ONCE(!ci->status)) + return -EPIPE; + hwep = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in; ci->status->context = ci; ci->status->complete = isr_setup_status_complete; @@ -1875,8 +1884,6 @@ static int udc_start(struct ci_hdrc *ci) struct usb_otg_caps *otg_caps = &ci->platdata->ci_otg_caps; int retval = 0; - spin_lock_init(&ci->lock); - ci->gadget.ops = &usb_gadget_ops; ci->gadget.speed = USB_SPEED_UNKNOWN; ci->gadget.max_speed = USB_SPEED_HIGH; |