usb: dwc3: re-enable runtime PM after failed resume

When dwc3_resume_common() returns an error, runtime pm is left in
suspended and disabled state in dwc3_resume(). Since the device
is suspended, its parent devices (like the power domain or glue
driver) could also be suspended and may have released resources
that dwc requires. Consequently, calling dwc3_suspend_common() in
this situation could result in attempts to access unclocked or
unpowered registers.
To prevent these problems, runtime PM should always be re-enabled,
even after failed resume attempts. This ensures that
dwc3_suspend_common() is skipped in such cases.

Fixes: 68c26fe58182 ("usb: dwc3: set pm runtime active before resume common")
Cc: [e-mail]
Signed-off-by: Roy Luo <[e-mail]>
Acked-by: Thinh Nguyen <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/dwc3/core.c

···
 static int dwc3_resume(struct device *dev)
 {
 	struct dwc3	*dwc = dev_get_drvdata(dev);
-	int		ret;
+	int		ret = 0;
 
 	pinctrl_pm_select_default_state(dev);
 
···
 	pm_runtime_set_active(dev);
 
 	ret = dwc3_resume_common(dwc, PMSG_RESUME);
-	if (ret) {
+	if (ret)
 		pm_runtime_set_suspended(dev);
-		return ret;
-	}
 
 	pm_runtime_enable(dev);
 
-	return 0;
+	return ret;
 }
 
 static void dwc3_complete(struct device *dev)