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-rw-r--r--drivers/base/core.c13
-rw-r--r--drivers/base/module.c4
-rw-r--r--drivers/base/regmap/regmap-kunit.c72
3 files changed, 57 insertions, 32 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2b4c0624b7..b539926219 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -25,6 +25,7 @@
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
#include <linux/sched/signal.h>
#include <linux/sched/mm.h>
#include <linux/string_helpers.h>
@@ -2640,6 +2641,7 @@ static const char *dev_uevent_name(const struct kobject *kobj)
static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
{
const struct device *dev = kobj_to_dev(kobj);
+ struct device_driver *driver;
int retval = 0;
/* add device node properties if present */
@@ -2668,8 +2670,12 @@ static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
if (dev->type && dev->type->name)
add_uevent_var(env, "DEVTYPE=%s", dev->type->name);
- if (dev->driver)
- add_uevent_var(env, "DRIVER=%s", dev->driver->name);
+ /* Synchronize with module_remove_driver() */
+ rcu_read_lock();
+ driver = READ_ONCE(dev->driver);
+ if (driver)
+ add_uevent_var(env, "DRIVER=%s", driver->name);
+ rcu_read_unlock();
/* Add common DT information about the device */
of_device_uevent(dev, env);
@@ -2739,11 +2745,8 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
if (!env)
return -ENOMEM;
- /* Synchronize with really_probe() */
- device_lock(dev);
/* let the kset specific function add its keys */
retval = kset->uevent_ops->uevent(&dev->kobj, env);
- device_unlock(dev);
if (retval)
goto out;
diff --git a/drivers/base/module.c b/drivers/base/module.c
index a1b55da071..b0b79b9c18 100644
--- a/drivers/base/module.c
+++ b/drivers/base/module.c
@@ -7,6 +7,7 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/rcupdate.h>
#include "base.h"
static char *make_driver_name(struct device_driver *drv)
@@ -97,6 +98,9 @@ void module_remove_driver(struct device_driver *drv)
if (!drv)
return;
+ /* Synchronize with dev_uevent() */
+ synchronize_rcu();
+
sysfs_remove_link(&drv->p->kobj, "module");
if (drv->owner)
diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
index be32cd4e84..292e86f601 100644
--- a/drivers/base/regmap/regmap-kunit.c
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -145,9 +145,9 @@ static struct regmap *gen_regmap(struct kunit *test,
const struct regmap_test_param *param = test->param_value;
struct regmap_test_priv *priv = test->priv;
unsigned int *buf;
- struct regmap *ret;
+ struct regmap *ret = ERR_PTR(-ENOMEM);
size_t size;
- int i;
+ int i, error;
struct reg_default *defaults;
config->cache_type = param->cache;
@@ -172,15 +172,17 @@ static struct regmap *gen_regmap(struct kunit *test,
*data = kzalloc(sizeof(**data), GFP_KERNEL);
if (!(*data))
- return ERR_PTR(-ENOMEM);
+ goto out_free;
(*data)->vals = buf;
if (config->num_reg_defaults) {
- defaults = kcalloc(config->num_reg_defaults,
- sizeof(struct reg_default),
- GFP_KERNEL);
+ defaults = kunit_kcalloc(test,
+ config->num_reg_defaults,
+ sizeof(struct reg_default),
+ GFP_KERNEL);
if (!defaults)
- return ERR_PTR(-ENOMEM);
+ goto out_free;
+
config->reg_defaults = defaults;
for (i = 0; i < config->num_reg_defaults; i++) {
@@ -190,12 +192,19 @@ static struct regmap *gen_regmap(struct kunit *test,
}
ret = regmap_init_ram(priv->dev, config, *data);
- if (IS_ERR(ret)) {
- kfree(buf);
- kfree(*data);
- } else {
- kunit_add_action(test, regmap_exit_action, ret);
- }
+ if (IS_ERR(ret))
+ goto out_free;
+
+ /* This calls regmap_exit() on failure, which frees buf and *data */
+ error = kunit_add_action_or_reset(test, regmap_exit_action, ret);
+ if (error)
+ ret = ERR_PTR(error);
+
+ return ret;
+
+out_free:
+ kfree(buf);
+ kfree(*data);
return ret;
}
@@ -1497,9 +1506,9 @@ static struct regmap *gen_raw_regmap(struct kunit *test,
struct regmap_test_priv *priv = test->priv;
const struct regmap_test_param *param = test->param_value;
u16 *buf;
- struct regmap *ret;
+ struct regmap *ret = ERR_PTR(-ENOMEM);
size_t size = (config->max_register + 1) * config->reg_bits / 8;
- int i;
+ int i, error;
struct reg_default *defaults;
config->cache_type = param->cache;
@@ -1515,15 +1524,16 @@ static struct regmap *gen_raw_regmap(struct kunit *test,
*data = kzalloc(sizeof(**data), GFP_KERNEL);
if (!(*data))
- return ERR_PTR(-ENOMEM);
+ goto out_free;
(*data)->vals = (void *)buf;
config->num_reg_defaults = config->max_register + 1;
- defaults = kcalloc(config->num_reg_defaults,
- sizeof(struct reg_default),
- GFP_KERNEL);
+ defaults = kunit_kcalloc(test,
+ config->num_reg_defaults,
+ sizeof(struct reg_default),
+ GFP_KERNEL);
if (!defaults)
- return ERR_PTR(-ENOMEM);
+ goto out_free;
config->reg_defaults = defaults;
for (i = 0; i < config->num_reg_defaults; i++) {
@@ -1536,7 +1546,8 @@ static struct regmap *gen_raw_regmap(struct kunit *test,
defaults[i].def = be16_to_cpu(buf[i]);
break;
default:
- return ERR_PTR(-EINVAL);
+ ret = ERR_PTR(-EINVAL);
+ goto out_free;
}
}
@@ -1548,12 +1559,19 @@ static struct regmap *gen_raw_regmap(struct kunit *test,
config->num_reg_defaults = 0;
ret = regmap_init_raw_ram(priv->dev, config, *data);
- if (IS_ERR(ret)) {
- kfree(buf);
- kfree(*data);
- } else {
- kunit_add_action(test, regmap_exit_action, ret);
- }
+ if (IS_ERR(ret))
+ goto out_free;
+
+ /* This calls regmap_exit() on failure, which frees buf and *data */
+ error = kunit_add_action_or_reset(test, regmap_exit_action, ret);
+ if (error)
+ ret = ERR_PTR(error);
+
+ return ret;
+
+out_free:
+ kfree(buf);
+ kfree(*data);
return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 05:13:45 +0000