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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 <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>
This commit is contained in:
Kay Sievers
2007-08-14 15:15:12 +02:00
committed by Greg Kroah-Hartman
parent 8380770c84
commit 7eff2e7a8b
47 changed files with 300 additions and 636 deletions
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14
drivers/s390/crypto/ap_bus.c
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@@ -458,28 +458,22 @@ static int ap_bus_match(struct device *dev, struct device_driver *drv)
* uevent function for AP devices. It sets up a single environment
* variable DEV_TYPE which contains the hardware device type.
*/
static int ap_uevent (struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
static int ap_uevent (struct device *dev, struct kobj_uevent_env *env)
{
struct ap_device *ap_dev = to_ap_dev(dev);
int retval = 0, length = 0, i = 0;
int retval = 0;
if (!ap_dev)
return -ENODEV;
/* Set up DEV_TYPE environment variable. */
retval = add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"DEV_TYPE=%04X", ap_dev->device_type);
retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type);
if (retval)
return retval;
/* Add MODALIAS= */
retval = add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
"MODALIAS=ap:t%02X", ap_dev->device_type);
retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type);
envp[i] = NULL;
return retval;
}