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 <architt at codeaurora.org>
---
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 26129bf..e350b2e 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;
}
--
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