[PATCHv4 11/12] usb: dwc2: check that the host work queue is valid

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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().

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);
-- 
2.0.3

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