linux-kernel - [PATCH 01/16] hwmon: (mr75203) fix VM sensor allocation when "intel,vm-map" not defined

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Message-ID: <20220816082757.11990-2-farbere@amazon.com>
Date:   Tue, 16 Aug 2022 08:27:42 +0000
From:   Eliav Farber <farbere@...zon.com>
To:     <jdelvare@...e.com>, <linux@...ck-us.net>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <linux-hwmon@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <farbere@...zon.com>, <talel@...zon.com>, <hhhawa@...zon.com>,
        <jonnyc@...zon.com>, <hanochu@...zon.com>, <ronenk@...zon.com>,
        <itamark@...zon.com>, <shellykz@...zon.com>, <shorer@...zon.com>,
        <amitlavi@...zon.com>, <almogbs@...zon.com>, <dwmw@...zon.co.uk>,
        <rtanwar@...linear.com>
Subject: [PATCH 01/16] hwmon: (mr75203) fix VM sensor allocation when "intel,vm-map" not defined

Fix a bug that in case "intel,vm-map" is missing 'num' is set to 0,
and no voltage channel infos are allocated.

Signed-off-by: Eliav Farber <farbere@...zon.com>
---
 drivers/hwmon/mr75203.c | 28 ++++++++++++----------------
 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/hwmon/mr75203.c b/drivers/hwmon/mr75203.c
index 046523d47c29..0e29877a1a9c 100644
--- a/drivers/hwmon/mr75203.c
+++ b/drivers/hwmon/mr75203.c
@@ -580,8 +580,6 @@ static int mr75203_probe(struct platform_device *pdev)
 	}
 
 	if (vm_num) {
-		u32 num = vm_num;
-
 		ret = pvt_get_regmap(pdev, "vm", pvt);
 		if (ret)
 			return ret;
@@ -594,30 +592,28 @@ static int mr75203_probe(struct platform_device *pdev)
 		ret = device_property_read_u8_array(dev, "intel,vm-map",
 						    pvt->vm_idx, vm_num);
 		if (ret) {
-			num = 0;
+			/*
+			 * Incase intel,vm-map property is not defined, we
+			 * assume incremental channel numbers.
+			 */
+			for (i = 0; i < vm_num; i++)
+				pvt->vm_idx[i] = i;
 		} else {
 			for (i = 0; i < vm_num; i++)
 				if (pvt->vm_idx[i] >= vm_num ||
-				    pvt->vm_idx[i] == 0xff) {
-					num = i;
+				    pvt->vm_idx[i] == 0xff)
 					break;
-				}
-		}
 
-		/*
-		 * Incase intel,vm-map property is not defined, we assume
-		 * incremental channel numbers.
-		 */
-		for (i = num; i < vm_num; i++)
-			pvt->vm_idx[i] = i;
+			vm_num = i;
+		}
 
-		in_config = devm_kcalloc(dev, num + 1,
+		in_config = devm_kcalloc(dev, vm_num + 1,
 					 sizeof(*in_config), GFP_KERNEL);
 		if (!in_config)
 			return -ENOMEM;
 
-		memset32(in_config, HWMON_I_INPUT, num);
-		in_config[num] = 0;
+		memset32(in_config, HWMON_I_INPUT, vm_num);
+		in_config[vm_num] = 0;
 		pvt_in.config = in_config;
 
 		pvt_info[index++] = &pvt_in;
-- 
2.37.1