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Driver core: change add_uevent_var to use a struct

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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 <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Cornelia Huck <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Kay Sievers 2007-08-14 15:15:12 +02:00 • committed by Greg Kroah-Hartman
commit 7eff2e7a8b
47 changed files with 300 additions and 636 deletions
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15
drivers/firmware/dmi-id.c
View file

@ -134,14 +134,17 @@ static struct attribute_group* sys_dmi_attribute_groups[] = {
NULL
};
static int dmi_dev_uevent(struct device *dev, char **envp,
int num_envp, char *buffer, int buffer_size)
static int dmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
strcpy(buffer, "MODALIAS=");
get_modalias(buffer+9, buffer_size-9);
envp[0] = buffer;
envp[1] = NULL;
ssize_t len;
if (add_uevent_var(env, "MODALIAS="))
return -ENOMEM;
len = get_modalias(&env->buf[env->buflen - 1],
sizeof(env->buf) - env->buflen);
if (len >= (sizeof(env->buf) - env->buflen))
return -ENOMEM;
env->buflen += len;
return 0;
}