media: s5p_cec: decrement usage count if disabled

[ Upstream commit 747bad54a677d8633ec14b39dfbeb859c821d7f2 ]

There's a bug at s5p_cec_adap_enable(): if called to
disable the device, it should call pm_runtime_put()
instead of pm_runtime_disable(), as the goal here is to
decrement the usage_count and not to disable PM runtime.

Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: 1bcbf6f ("[media] cec: s5p-cec: Add s5p-cec driver")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/media/platform/s5p-cec/s5p_cec.c

@@ -55,7 +55,7 @@ static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
 	} else {
 		s5p_cec_mask_tx_interrupts(cec);
 		s5p_cec_mask_rx_interrupts(cec);
-		pm_runtime_disable(cec->dev);
+		pm_runtime_put(cec->dev);
 	}
 
 	return 0;