From 0559a538899d48e7d730affb9df2abb13a7d9008 Mon Sep 17 00:00:00 2001
From: Henrik Rydberg <rydberg@euromail.se>
Date: Tue, 11 May 2010 09:17:47 +0200
Subject: [PATCH] hwmon: (applesmc) Correct sysfs fan error handling
The current code will not remove the sysfs files for fan numbers three
and up. Also, upon exit, fans one and two are removed regardless of
their existence. This patch cleans up the sysfs error handling for
the fans.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
---
drivers/hwmon/applesmc.c | 61 ++++++++++++++++------------------------
1 file changed, 25 insertions(+), 36 deletions(-)
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index 0f28d91f29d8e..f085c18d2905a 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -195,6 +195,9 @@ static unsigned int applesmc_accelerometer;
/* Indicates whether this computer has light sensors and keyboard backlight. */
static unsigned int applesmc_light;
+/* The number of fans handled by the driver */
+static unsigned int fans_handled;
+
/* Indicates which temperature sensors set to use. */
static unsigned int applesmc_temperature_set;
@@ -1492,39 +1495,24 @@ static int __init applesmc_init(void)
/* create fan files */
count = applesmc_get_fan_count();
- if (count < 0) {
+ if (count < 0)
printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
- } else {
+ else
printk(KERN_INFO "applesmc: %d fans found.\n", count);
- switch (count) {
- default:
- printk(KERN_WARNING "applesmc: More than 4 fans found,"
- " but at most 4 fans are supported"
- " by the driver.\n");
- case 4:
- ret = sysfs_create_group(&pdev->dev.kobj,
- &fan_attribute_groups[3]);
- if (ret)
- goto out_key_enumeration;
- case 3:
- ret = sysfs_create_group(&pdev->dev.kobj,
- &fan_attribute_groups[2]);
- if (ret)
- goto out_key_enumeration;
- case 2:
- ret = sysfs_create_group(&pdev->dev.kobj,
- &fan_attribute_groups[1]);
- if (ret)
- goto out_key_enumeration;
- case 1:
- ret = sysfs_create_group(&pdev->dev.kobj,
- &fan_attribute_groups[0]);
- if (ret)
- goto out_fan_1;
- case 0:
- ;
- }
+ if (count > 4) {
+ count = 4;
+ printk(KERN_WARNING "applesmc: More than 4 fans found,"
+ " but at most 4 fans are supported"
+ " by the driver.\n");
+ }
+
+ while (fans_handled < count) {
+ ret = sysfs_create_group(&pdev->dev.kobj,
+ &fan_attribute_groups[fans_handled]);
+ if (ret)
+ goto out_fans;
+ fans_handled++;
}
for (i = 0;
@@ -1593,10 +1581,10 @@ static int __init applesmc_init(void)
applesmc_release_accelerometer();
out_temperature:
sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
- sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
-out_fan_1:
- sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
-out_key_enumeration:
+out_fans:
+ while (fans_handled)
+ sysfs_remove_group(&pdev->dev.kobj,
+ &fan_attribute_groups[--fans_handled]);
sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
out_name:
sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
@@ -1622,8 +1610,9 @@ static void __exit applesmc_exit(void)
if (applesmc_accelerometer)
applesmc_release_accelerometer();
sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
- sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
- sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
+ while (fans_handled)
+ sysfs_remove_group(&pdev->dev.kobj,
+ &fan_attribute_groups[--fans_handled]);
sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
platform_device_unregister(pdev);
--
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