in vc4_dsi_encoder_enable, the call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning.

* Can the term “reference count” become relevant also for this commit message besides other possible adjustments?

* Can it be nicer to combine proposed updates for this software module as a patch series (with a cover letter)?

* Would you like to add the tag “Fixes”?

…

+++ b/drivers/gpu/drm/vc4/vc4_dsi.c

…

@@ -1088,6 +1088,8 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) dev_info(&dsi->pdev->dev, "DSI regs after:\n"); drm_print_regset32(&p, &dsi->regset); } +out:

• pm_runtime_put(dev);

}

…

* Perhaps use the label “put_runtime” instead?

* Do you propose to perform an additional function call always (and not only according to failure cases)?

* How do you think about calling the function “pm_runtime_put_noidle”?

Regards, Markus