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From: Arnd Bergmann <arnd@arndb.de>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Peter Huewe <peterhuewe@gmx.de>,
	Marcel Selhorst <tpmdd@selhorst.net>,
	Jason Gunthorpe <jgunthorpe@obsidianresearch.com>,
	Nayna Jain <nayna@linux.vnet.ibm.com>,
	tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: [PATCH] tpm: fix node pointer lookup
Date: Tue, 15 Nov 2016 16:57:11 +0100	[thread overview]
Message-ID: <20161115155736.599954-1-arnd@arndb.de> (raw)

A rework left the node pointer uninitialized when the device tree
is not in use:

drivers/char/tpm/tpm_of.c: In function 'read_log_of':
drivers/char/tpm/tpm_of.c:37:8: error: 'np' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This reverts the behavior to what it should be.

Fixes: 4a45d9669ac1 ("tpm: replace of_find_node_by_name() with dev of_node property")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/char/tpm/tpm_of.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c
index 3af829f3ad59..24fa6afc2e55 100644
--- a/drivers/char/tpm/tpm_of.c
+++ b/drivers/char/tpm/tpm_of.c
@@ -29,8 +29,7 @@ int read_log_of(struct tpm_chip *chip)
 	struct tpm_bios_log *log;
 
 	log = &chip->log;
-	if (chip->dev.parent->of_node)
-		np = chip->dev.parent->of_node;
+	np = chip->dev.parent->of_node;
 	if (!np)
 		return -ENODEV;
 
-- 
2.9.0

WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Jarkko Sakkinen
	<jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Cc: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: [PATCH] tpm: fix node pointer lookup
Date: Tue, 15 Nov 2016 16:57:11 +0100	[thread overview]
Message-ID: <20161115155736.599954-1-arnd@arndb.de> (raw)

A rework left the node pointer uninitialized when the device tree
is not in use:

drivers/char/tpm/tpm_of.c: In function 'read_log_of':
drivers/char/tpm/tpm_of.c:37:8: error: 'np' may be used uninitialized in this function [-Werror=maybe-uninitialized]

This reverts the behavior to what it should be.

Fixes: 4a45d9669ac1 ("tpm: replace of_find_node_by_name() with dev of_node property")
Signed-off-by: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
---
 drivers/char/tpm/tpm_of.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c
index 3af829f3ad59..24fa6afc2e55 100644
--- a/drivers/char/tpm/tpm_of.c
+++ b/drivers/char/tpm/tpm_of.c
@@ -29,8 +29,7 @@ int read_log_of(struct tpm_chip *chip)
 	struct tpm_bios_log *log;
 
 	log = &chip->log;
-	if (chip->dev.parent->of_node)
-		np = chip->dev.parent->of_node;
+	np = chip->dev.parent->of_node;
 	if (!np)
 		return -ENODEV;
 
-- 
2.9.0


------------------------------------------------------------------------------

             reply	other threads:[~2016-11-15 15:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-15 15:57 Arnd Bergmann [this message]
2016-11-15 15:57 ` [PATCH] tpm: fix node pointer lookup Arnd Bergmann
2016-11-15 17:36 ` Jarkko Sakkinen

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