[6/6] drm/tegra: output: Fix missing i2c_put_adapter() in the error handling paths of tegra_output_probe()

Commit Message

Christophe JAILLET Sept. 2, 2023, 3:22 p.m. UTC

If an error occurs after a successful of_get_i2c_adapter_by_node() call, it
should be undone by a corresponding i2c_put_adapter().

Add the missing i2c_put_adapter() call.

Fixes: 9be7d864cf07 ("drm/tegra: Implement panel support")
Signed-off-by: Christophe JAILLET <[e-mail]>
---
 drivers/gpu/drm/tegra/output.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
index dc2dcb5ca1c8..d7d2389ac2f5 100644
--- a/drivers/gpu/drm/tegra/output.c
+++ b/drivers/gpu/drm/tegra/output.c
@@ -142,8 +142,10 @@  int tegra_output_probe(struct tegra_output *output)
 					GPIOD_IN,
 					"HDMI hotplug detect");
 	if (IS_ERR(output->hpd_gpio)) {
-		if (PTR_ERR(output->hpd_gpio) != -ENOENT)
-			return PTR_ERR(output->hpd_gpio);
+		if (PTR_ERR(output->hpd_gpio) != -ENOENT) {
+			err = PTR_ERR(output->hpd_gpio);
+			goto put_i2c;
+		}
 
 		output->hpd_gpio = NULL;
 	}
@@ -152,7 +154,7 @@  int tegra_output_probe(struct tegra_output *output)
 		err = gpiod_to_irq(output->hpd_gpio);
 		if (err < 0) {
 			dev_err(output->dev, "gpiod_to_irq(): %d\n", err);
-			return err;
+			goto put_i2c;
 		}
 
 		output->hpd_irq = err;
@@ -165,7 +167,7 @@  int tegra_output_probe(struct tegra_output *output)
 		if (err < 0) {
 			dev_err(output->dev, "failed to request IRQ#%u: %d\n",
 				output->hpd_irq, err);
-			return err;
+			goto put_i2c;
 		}
 
 		output->connector.polled = DRM_CONNECTOR_POLL_HPD;
@@ -179,6 +181,12 @@  int tegra_output_probe(struct tegra_output *output)
 	}
 
 	return 0;
+
+put_i2c:
+	if (output->ddc)
+		i2c_put_adapter(output->ddc);
+
+	return err;
 }
 
 void tegra_output_remove(struct tegra_output *output)