From c899f9358485869a6e18902233eb77b31f0428ee Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Mon, 2 May 2016 11:05:52 +0530 Subject: [PATCH] drm/msm/hdmi: Prevent gpio_free related kernel warnings Calling the legacy gpio_free on an invalid GPIO (a GPIO numbered -1) results in kernel warnings. This causes a lot of backtraces when we try to unload the drm/msm module. Call gpio_free only on valid GPIOs. Signed-off-by: Archit Taneja Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c index 26129bff2dd6..e350b2e1fce1 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c @@ -112,6 +112,9 @@ static int gpio_config(struct hdmi *hdmi, bool on) for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { struct hdmi_gpio_data gpio = config->gpios[i]; + if (gpio.num == -1) + continue; + if (gpio.output) { int value = gpio.value ? 0 : 1; @@ -126,8 +129,10 @@ static int gpio_config(struct hdmi *hdmi, bool on) return 0; err: - while (i--) - gpio_free(config->gpios[i].num); + while (i--) { + if (config->gpios[i].num != -1) + gpio_free(config->gpios[i].num); + } return ret; } -- 2.39.5