i2c_acpi_find_adapter_by_handle() returns the i2c adapter with its
device reference incremented. The lookup callback only reads the bus
number and never drops the reference. Put it back once done.
Fixes: 8cbf89db2941 ("drm/i915/dsi: Parse the I2C element from the VBT MIPI sequence block (v3)")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index fe12041e913c..2097c5d17cb7 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -460,8 +460,10 @@ static int i2c_adapter_lookup(struct acpi_resource *ares, void *data)
return 1;
adapter = i2c_acpi_find_adapter_by_handle(adapter_handle);
- if (adapter)
+ if (adapter) {
intel_dsi->i2c_bus_num = adapter->nr;
+ put_device(&adapter->dev);
+ }
return 1;
}
--
2.34.1