USB: dwc2: hande irq on dead controller correctly

If the controller is dead, the honest answer to the question whether it has caused an irq is: unknown As the purpose of the irq return is to trigger switching off an IRQ, the correct response if you cannot determine if your device has caused the interrupt is IRQ_HANDLED Signed-off-by: Oliver Neukum <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
wafgo · Aug 22, 2023 · 2ccbe85 · 2ccbe85
1 parent 09867af
commit 2ccbe85
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c
@@ -2203,11 +2203,13 @@ static void dwc2_hc_intr(struct dwc2_hsotg *hsotg)
 irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg)
 {
 	u32 gintsts, dbg_gintsts;
-	irqreturn_t retval = IRQ_NONE;
+	irqreturn_t retval = IRQ_HANDLED;
 
 	if (!dwc2_is_controller_alive(hsotg)) {
 		dev_warn(hsotg->dev, "Controller is dead\n");
 		return retval;
+	} else {
+		retval = IRQ_NONE;
 	}
 
 	spin_lock(&hsotg->lock);