linux-kernel - [PATCH 1/8] powerpc/nvram: Return directly after a failed parameter validation in dev_nvram

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Message-ID: <5a23fa96-5227-3bcd-414d-65b2ae1f2f52@users.sourceforge.net>
Date:   Thu, 19 Jan 2017 17:53:57 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linuxppc-dev@...ts.ozlabs.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Daniel Axtens <dja@...ens.net>,
        Geliang Tang <geliangtang@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Pan Xinhui <xinhui.pan@...ux.vnet.ibm.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Paul Mackerras <paulus@...ba.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/8] powerpc/nvram: Return directly after a failed parameter
 validation in dev_nvram_write()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 19 Jan 2017 15:22:56 +0100

* Return directly after an inappropriate input parameter was detected.

* Delete an initialisation for the variable "tmp" at the beginning
  and an assignment for the variable "ret" which became unnecessary
  with this refactoring.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/powerpc/kernel/nvram_64.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 34d2c595de23..37d08b95c3f0 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -790,17 +790,15 @@ static ssize_t dev_nvram_write(struct file *file, const char __user *buf,
 			  size_t count, loff_t *ppos)
 {
 	ssize_t ret;
-	char *tmp = NULL;
+	char *tmp;
 	ssize_t size;
 
-	ret = -ENODEV;
 	if (!ppc_md.nvram_size)
-		goto out;
+		return -ENODEV;
 
-	ret = 0;
 	size = ppc_md.nvram_size();
 	if (*ppos >= size || size < 0)
-		goto out;
+		return 0;
 
 	count = min_t(size_t, count, size - *ppos);
 	count = min(count, PAGE_SIZE);
-- 
2.11.0