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 --- 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