USB: dwc3: fix runtime pm imbalance on probe errors

Make sure not to suspend the device when probe fails to avoid disabling
clocks and phys multiple times.

Fixes: 328082376aea ("usb: dwc3: fix runtime PM in error path")
Cc: stable@vger.kernel.org      # 4.8
Cc: Roger Quadros <rogerq@ti.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230404072524.19014-2-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index ed0ab90..d2350a8 100644 (file)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1895,13 +1895,11 @@ static int dwc3_probe(struct platform_device *pdev)
        spin_lock_init(&dwc->lock);
        mutex_init(&dwc->mutex);
 
+       pm_runtime_get_noresume(dev);
        pm_runtime_set_active(dev);
        pm_runtime_use_autosuspend(dev);
        pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY);
        pm_runtime_enable(dev);
-       ret = pm_runtime_get_sync(dev);
-       if (ret < 0)
-               goto err1;
 
        pm_runtime_forbid(dev);
 
@@ -1966,12 +1964,10 @@ err3:
        dwc3_free_event_buffers(dwc);
 
 err2:
-       pm_runtime_allow(&pdev->dev);
-
-err1:
-       pm_runtime_put_sync(&pdev->dev);
-       pm_runtime_disable(&pdev->dev);
-
+       pm_runtime_allow(dev);
+       pm_runtime_disable(dev);
+       pm_runtime_set_suspended(dev);
+       pm_runtime_put_noidle(dev);
 disable_clks:
        dwc3_clk_disable(dwc);
 assert_reset: