From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Berger Subject: [PATCH 1/2] tpm: Check for parent device being NULL Date: Thu, 17 Nov 2016 19:30:03 -0500 Message-ID: <1479429004-7962-1-git-send-email-stefanb@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tpmdd-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: tpmdd-devel@lists.sourceforge.net Check for the parent device being NULL before accessing it. This prevents crashed with the vtpm_proxy driver, since this driver does not have a parent device. Signed-off-by: Stefan Berger --- drivers/char/tpm/tpm_of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c index 36df9df..72c282e 100644 --- a/drivers/char/tpm/tpm_of.c +++ b/drivers/char/tpm/tpm_of.c @@ -29,7 +29,7 @@ int tpm_read_log_of(struct tpm_chip *chip) struct tpm_bios_log *log; log = &chip->log; - if (chip->dev.parent->of_node) + if (chip->dev.parent && chip->dev.parent->of_node) np = chip->dev.parent->of_node; else return -ENODEV; -- 2.4.3 ------------------------------------------------------------------------------