[ added linux-kernel ML to cc: ]
Hi,
On Tuesday, August 26, 2014 11:20:02 AM dinguyen@xxxxxxxxxxxxxxxxxxxxx wrote:
> From: Dinh Nguyen <dinguyen@xxxxxxxxxxxxxxxxxxxxx>
>
> The Host workqueue will not get initialized if the driver is configured for
> peripheral mode only. Thus we need to check for wq_otg before calling
> queue_work().
This should be done at the same time that gadget/host probing is merged
to preserve bisectability.
> Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxxxxxxxxxxxxx>
> Acked-by: Paul Zimmerman <paulz@xxxxxxxxxxxx>
> ---
> drivers/usb/dwc2/core_intr.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
> index 651785d..1240875 100644
> --- a/drivers/usb/dwc2/core_intr.c
> +++ b/drivers/usb/dwc2/core_intr.c
> @@ -287,9 +287,11 @@ static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
> * Release lock before scheduling workq as it holds spinlock during
> * scheduling.
> */
> - spin_unlock(&hsotg->lock);
> - queue_work(hsotg->wq_otg, &hsotg->wf_otg);
> - spin_lock(&hsotg->lock);
> + if (hsotg->wq_otg) {
> + spin_unlock(&hsotg->lock);
> + queue_work(hsotg->wq_otg, &hsotg->wf_otg);
> + spin_lock(&hsotg->lock);
> + }
>
> /* Clear interrupt */
> writel(GINTSTS_CONIDSTSCHNG, hsotg->regs + GINTSTS);
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
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