Commit 47b6e477 authored Oct 10, 2013 by Jean Delvare Committed by Wolfram Sang Oct 10, 2013

i2c: Not all adapters have a parent



The code in acpi_i2c_register_devices() assumes that all i2c adapters
have a parent. This is not necessarily the case, for example the
i2c-stub driver instantiate a virtual i2c adapter without a parent.
Check for this to avoid a NULL pointer deference.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

parent 6d2cfb10

drivers/i2c/i2c-core.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1134,6 +1134,9 @@ static void acpi_i2c_register_devices(struct i2c_adapter *adap)
		acpi_handle handle;
		acpi_status status;

		if (!adap->dev.parent)
		return;

		handle = ACPI_HANDLE(adap->dev.parent);
		if (!handle)
		return;