[PATCH] drm/exynos: hdmi: take i2c adapter module reference

[PATCH] drm/exynos: hdmi: take i2c adapter module reference

[Johan Hovold]

The i2c subsystem currently blocks during adapter deregistration
whenever there are consumers holding a reference.

Switch to using of_get_i2c_adapter_by_node() which also takes a
reference to the adapter module so that an attempt to unload the module
while in use fails gracefully instead of blocking uninterruptibly.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 09b2cabb236f..b971b7098a4d 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1913,7 +1913,7 @@ static int hdmi_get_ddc_adapter(struct hdmi_context *hdata)
 		return -ENODEV;
 	}
 
-	adpt = of_find_i2c_adapter_by_node(np);
+	adpt = of_get_i2c_adapter_by_node(np);
 	of_node_put(np);
 
 	if (!adpt) {
@@ -2069,7 +2069,7 @@ static int hdmi_probe(struct platform_device *pdev)
 	if (hdata->regs_hdmiphy)
 		iounmap(hdata->regs_hdmiphy);
 err_ddc:
-	put_device(&hdata->ddc_adpt->dev);
+	i2c_put_adapter(hdata->ddc_adpt);
 
 	return ret;
 }
@@ -2094,7 +2094,7 @@ static void hdmi_remove(struct platform_device *pdev)
 	if (hdata->regs_hdmiphy)
 		iounmap(hdata->regs_hdmiphy);
 
-	put_device(&hdata->ddc_adpt->dev);
+	i2c_put_adapter(hdata->ddc_adpt);
 
 	drm_bridge_put(hdata->bridge);
 
-- 
2.54.0