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authorKay Sievers <kay.sievers@vrfy.org>2007-08-14 15:15:12 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:51:01 -0700
commit7eff2e7a8b65c25920207324e56611150eb1cd9a (patch)
tree02a0eeba9d25d996233e30c18f258dfae0ae2139 /drivers/power
parent8380770c842faef3001e44662953d64ad9a93663 (diff)
downloadlinux-7eff2e7a8b65c25920207324e56611150eb1cd9a.tar.bz2
Driver core: change add_uevent_var to use a struct
This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/power_supply.h3
-rw-r--r--drivers/power/power_supply_sysfs.c17
2 files changed, 6 insertions, 14 deletions
diff --git a/drivers/power/power_supply.h b/drivers/power/power_supply.h
index a9880d468ee4..f38ba482be75 100644
--- a/drivers/power/power_supply.h
+++ b/drivers/power/power_supply.h
@@ -14,8 +14,7 @@
extern int power_supply_create_attrs(struct power_supply *psy);
extern void power_supply_remove_attrs(struct power_supply *psy);
-extern int power_supply_uevent(struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size);
+extern int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env);
#else
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index de3155b21285..249f61bae639 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -195,11 +195,10 @@ static char *kstruprdup(const char *str, gfp_t gfp)
return ret;
}
-int power_supply_uevent(struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct power_supply *psy = dev_get_drvdata(dev);
- int i = 0, length = 0, ret = 0, j;
+ int ret = 0, j;
char *prop_buf;
char *attrname;
@@ -212,8 +211,7 @@ int power_supply_uevent(struct device *dev, char **envp, int num_envp,
dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name);
- ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
- &length, "POWER_SUPPLY_NAME=%s", psy->name);
+ ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name);
if (ret)
return ret;
@@ -243,9 +241,7 @@ int power_supply_uevent(struct device *dev, char **envp, int num_envp,
dev_dbg(dev, "Static prop %s=%s\n", attrname, prop_buf);
- ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
- &length, "POWER_SUPPLY_%s=%s",
- attrname, prop_buf);
+ ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
kfree(attrname);
if (ret)
goto out;
@@ -282,14 +278,11 @@ int power_supply_uevent(struct device *dev, char **envp, int num_envp,
dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf);
- ret = add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
- &length, "POWER_SUPPLY_%s=%s",
- attrname, prop_buf);
+ ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
kfree(attrname);
if (ret)
goto out;
}
- envp[i] = NULL;
out:
free_page((unsigned long)prop_buf);