linux-kernel - [PATCH v3 3/3] intel-mid: Move boundry check to the start of init code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <d1643b61f9d5b6fe7d1b168341d9b1e89696c43b.1473386382.git.sathyanarayanan.kuppuswamy@linux.intel.com>
Date:   Thu,  8 Sep 2016 19:07:10 -0700
From:   Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     andriy.shevchenko@...ux.intel.com, wharms@....de
Cc:     dan.carpenter@...cle.com, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, david.a.cohen@...ux.intel.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: [PATCH v3 3/3] intel-mid: Move boundry check to the start of init code

Moved the instance boundary check to the start of the pcal9555a
platform init code. This will prevent unnecessary initialization
on instance boundary error.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
---
 arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c b/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c
index cde764e..4e5dd95 100644
--- a/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c
+++ b/arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c
@@ -34,6 +34,12 @@ static void __init *pcal9555a_platform_data(void *info)
 	char intr_pin_name[SFI_NAME_LEN + 1];
 	int gpio_base, intr;
 
+	if (nr >= PCAL9555A_NUM) {
+		pr_err("%s: Too many instances, only %d supported\n", __func__,
+		       PCAL9555A_NUM);
+		return ERR_PTR(-ENOMEM);
+	}
+
 	snprintf(base_pin_name, sizeof(base_pin_name), "%s_base", type);
 	snprintf(intr_pin_name, sizeof(intr_pin_name), "%s_int", type);
 
@@ -47,12 +53,6 @@ static void __init *pcal9555a_platform_data(void *info)
 		return NULL;
 	}
 
-	if (nr >= PCAL9555A_NUM) {
-		pr_err("%s: Too many instances, only %d supported\n", __func__,
-		       PCAL9555A_NUM);
-		return ERR_PTR(-ENOMEM);
-	}
-
 	pcal9555a = &pcal9555a_pdata[nr++];
 	pcal9555a->gpio_base = gpio_base;
 
-- 
2.7.4