Revision b5d281f6c16dd432b618bdfd36ddba1a58d5b603 authored by Christian Marangi on 19 June 2022, 22:03:51 UTC, committed by Chanwoo Choi on 29 June 2022, 20:11:17 UTC
On a devfreq PROBE_DEFER, the freq_table in the driver profile struct, is never reset and may be leaved in an undefined state. This comes from the fact that we store the freq_table in the driver profile struct that is commonly defined as static and not reset on PROBE_DEFER. We currently skip the reinit of the freq_table if we found it's already defined since a driver may declare his own freq_table. This logic is flawed in the case devfreq core generate a freq_table, set it in the profile struct and then PROBE_DEFER, freeing the freq_table. In this case devfreq will found a NOT NULL freq_table that has been freed, skip the freq_table generation and probe the driver based on the wrong table. To fix this and correctly handle PROBE_DEFER, use a local freq_table and max_state in the devfreq struct and never modify the freq_table present in the profile struct if it does provide it. Fixes: 0ec09ac2cebe ("PM / devfreq: Set the freq_table of devfreq device") Cc: stable@vger.kernel.org Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
1 parent f44b799
kunit-test.c
// SPDX-License-Identifier: GPL-2.0
/*
* KUnit test for core test infrastructure.
*
* Copyright (C) 2019, Google LLC.
* Author: Brendan Higgins <brendanhiggins@google.com>
*/
#include <kunit/test.h>
#include "try-catch-impl.h"
struct kunit_try_catch_test_context {
struct kunit_try_catch *try_catch;
bool function_called;
};
static void kunit_test_successful_try(void *data)
{
struct kunit *test = data;
struct kunit_try_catch_test_context *ctx = test->priv;
ctx->function_called = true;
}
static void kunit_test_no_catch(void *data)
{
struct kunit *test = data;
KUNIT_FAIL(test, "Catch should not be called\n");
}
static void kunit_test_try_catch_successful_try_no_catch(struct kunit *test)
{
struct kunit_try_catch_test_context *ctx = test->priv;
struct kunit_try_catch *try_catch = ctx->try_catch;
kunit_try_catch_init(try_catch,
test,
kunit_test_successful_try,
kunit_test_no_catch);
kunit_try_catch_run(try_catch, test);
KUNIT_EXPECT_TRUE(test, ctx->function_called);
}
static void kunit_test_unsuccessful_try(void *data)
{
struct kunit *test = data;
struct kunit_try_catch_test_context *ctx = test->priv;
struct kunit_try_catch *try_catch = ctx->try_catch;
kunit_try_catch_throw(try_catch);
KUNIT_FAIL(test, "This line should never be reached\n");
}
static void kunit_test_catch(void *data)
{
struct kunit *test = data;
struct kunit_try_catch_test_context *ctx = test->priv;
ctx->function_called = true;
}
static void kunit_test_try_catch_unsuccessful_try_does_catch(struct kunit *test)
{
struct kunit_try_catch_test_context *ctx = test->priv;
struct kunit_try_catch *try_catch = ctx->try_catch;
kunit_try_catch_init(try_catch,
test,
kunit_test_unsuccessful_try,
kunit_test_catch);
kunit_try_catch_run(try_catch, test);
KUNIT_EXPECT_TRUE(test, ctx->function_called);
}
static int kunit_try_catch_test_init(struct kunit *test)
{
struct kunit_try_catch_test_context *ctx;
ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
test->priv = ctx;
ctx->try_catch = kunit_kmalloc(test,
sizeof(*ctx->try_catch),
GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->try_catch);
return 0;
}
static struct kunit_case kunit_try_catch_test_cases[] = {
KUNIT_CASE(kunit_test_try_catch_successful_try_no_catch),
KUNIT_CASE(kunit_test_try_catch_unsuccessful_try_does_catch),
{}
};
static struct kunit_suite kunit_try_catch_test_suite = {
.name = "kunit-try-catch-test",
.init = kunit_try_catch_test_init,
.test_cases = kunit_try_catch_test_cases,
};
/*
* Context for testing test managed resources
* is_resource_initialized is used to test arbitrary resources
*/
struct kunit_test_resource_context {
struct kunit test;
bool is_resource_initialized;
int allocate_order[2];
int free_order[2];
};
static int fake_resource_init(struct kunit_resource *res, void *context)
{
struct kunit_test_resource_context *ctx = context;
res->data = &ctx->is_resource_initialized;
ctx->is_resource_initialized = true;
return 0;
}
static void fake_resource_free(struct kunit_resource *res)
{
bool *is_resource_initialized = res->data;
*is_resource_initialized = false;
}
static void kunit_resource_test_init_resources(struct kunit *test)
{
struct kunit_test_resource_context *ctx = test->priv;
kunit_init_test(&ctx->test, "testing_test_init_test", NULL);
KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
}
static void kunit_resource_test_alloc_resource(struct kunit *test)
{
struct kunit_test_resource_context *ctx = test->priv;
struct kunit_resource *res;
kunit_resource_free_t free = fake_resource_free;
res = kunit_alloc_and_get_resource(&ctx->test,
fake_resource_init,
fake_resource_free,
GFP_KERNEL,
ctx);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, res);
KUNIT_EXPECT_PTR_EQ(test,
&ctx->is_resource_initialized,
(bool *)res->data);
KUNIT_EXPECT_TRUE(test, list_is_last(&res->node, &ctx->test.resources));
KUNIT_EXPECT_PTR_EQ(test, free, res->free);
kunit_put_resource(res);
}
/*
* Note: tests below use kunit_alloc_and_get_resource(), so as a consequence
* they have a reference to the associated resource that they must release
* via kunit_put_resource(). In normal operation, users will only
* have to do this for cases where they use kunit_find_resource(), and the
* kunit_alloc_resource() function will be used (which does not take a
* resource reference).
*/
static void kunit_resource_test_destroy_resource(struct kunit *test)
{
struct kunit_test_resource_context *ctx = test->priv;
struct kunit_resource *res = kunit_alloc_and_get_resource(
&ctx->test,
fake_resource_init,
fake_resource_free,
GFP_KERNEL,
ctx);
kunit_put_resource(res);
KUNIT_ASSERT_FALSE(test,
kunit_destroy_resource(&ctx->test,
kunit_resource_instance_match,
res->data));
KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
}
static void kunit_resource_test_remove_resource(struct kunit *test)
{
struct kunit_test_resource_context *ctx = test->priv;
struct kunit_resource *res = kunit_alloc_and_get_resource(
&ctx->test,
fake_resource_init,
fake_resource_free,
GFP_KERNEL,
ctx);
/* The resource is in the list */
KUNIT_EXPECT_FALSE(test, list_empty(&ctx->test.resources));
/* Remove the resource. The pointer is still valid, but it can't be
* found.
*/
kunit_remove_resource(test, res);
KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
/* We haven't been freed yet. */
KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
/* Removing the resource multiple times is valid. */
kunit_remove_resource(test, res);
KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
/* Despite having been removed twice (from only one reference), the
* resource still has not been freed.
*/
KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
/* Free the resource. */
kunit_put_resource(res);
KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
}
static void kunit_resource_test_cleanup_resources(struct kunit *test)
{
int i;
struct kunit_test_resource_context *ctx = test->priv;
struct kunit_resource *resources[5];
for (i = 0; i < ARRAY_SIZE(resources); i++) {
resources[i] = kunit_alloc_and_get_resource(&ctx->test,
fake_resource_init,
fake_resource_free,
GFP_KERNEL,
ctx);
kunit_put_resource(resources[i]);
}
kunit_cleanup(&ctx->test);
KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
}
static void kunit_resource_test_mark_order(int order_array[],
size_t order_size,
int key)
{
int i;
for (i = 0; i < order_size && order_array[i]; i++)
;
order_array[i] = key;
}
#define KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, order_field, key) \
kunit_resource_test_mark_order(ctx->order_field, \
ARRAY_SIZE(ctx->order_field), \
key)
static int fake_resource_2_init(struct kunit_resource *res, void *context)
{
struct kunit_test_resource_context *ctx = context;
KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 2);
res->data = ctx;
return 0;
}
static void fake_resource_2_free(struct kunit_resource *res)
{
struct kunit_test_resource_context *ctx = res->data;
KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 2);
}
static int fake_resource_1_init(struct kunit_resource *res, void *context)
{
struct kunit_test_resource_context *ctx = context;
struct kunit_resource *res2;
res2 = kunit_alloc_and_get_resource(&ctx->test,
fake_resource_2_init,
fake_resource_2_free,
GFP_KERNEL,
ctx);
KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 1);
res->data = ctx;
kunit_put_resource(res2);
return 0;
}
static void fake_resource_1_free(struct kunit_resource *res)
{
struct kunit_test_resource_context *ctx = res->data;
KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 1);
}
/*
* TODO(brendanhiggins@google.com): replace the arrays that keep track of the
* order of allocation and freeing with strict mocks using the IN_SEQUENCE macro
* to assert allocation and freeing order when the feature becomes available.
*/
static void kunit_resource_test_proper_free_ordering(struct kunit *test)
{
struct kunit_test_resource_context *ctx = test->priv;
struct kunit_resource *res;
/* fake_resource_1 allocates a fake_resource_2 in its init. */
res = kunit_alloc_and_get_resource(&ctx->test,
fake_resource_1_init,
fake_resource_1_free,
GFP_KERNEL,
ctx);
/*
* Since fake_resource_2_init calls KUNIT_RESOURCE_TEST_MARK_ORDER
* before returning to fake_resource_1_init, it should be the first to
* put its key in the allocate_order array.
*/
KUNIT_EXPECT_EQ(test, ctx->allocate_order[0], 2);
KUNIT_EXPECT_EQ(test, ctx->allocate_order[1], 1);
kunit_put_resource(res);
kunit_cleanup(&ctx->test);
/*
* Because fake_resource_2 finishes allocation before fake_resource_1,
* fake_resource_1 should be freed first since it could depend on
* fake_resource_2.
*/
KUNIT_EXPECT_EQ(test, ctx->free_order[0], 1);
KUNIT_EXPECT_EQ(test, ctx->free_order[1], 2);
}
static void kunit_resource_test_static(struct kunit *test)
{
struct kunit_test_resource_context ctx;
struct kunit_resource res;
KUNIT_EXPECT_EQ(test, kunit_add_resource(test, NULL, NULL, &res, &ctx),
0);
KUNIT_EXPECT_PTR_EQ(test, res.data, (void *)&ctx);
kunit_cleanup(test);
KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
}
static void kunit_resource_test_named(struct kunit *test)
{
struct kunit_resource res1, res2, *found = NULL;
struct kunit_test_resource_context ctx;
KUNIT_EXPECT_EQ(test,
kunit_add_named_resource(test, NULL, NULL, &res1,
"resource_1", &ctx),
0);
KUNIT_EXPECT_PTR_EQ(test, res1.data, (void *)&ctx);
KUNIT_EXPECT_EQ(test,
kunit_add_named_resource(test, NULL, NULL, &res1,
"resource_1", &ctx),
-EEXIST);
KUNIT_EXPECT_EQ(test,
kunit_add_named_resource(test, NULL, NULL, &res2,
"resource_2", &ctx),
0);
found = kunit_find_named_resource(test, "resource_1");
KUNIT_EXPECT_PTR_EQ(test, found, &res1);
if (found)
kunit_put_resource(&res1);
KUNIT_EXPECT_EQ(test, kunit_destroy_named_resource(test, "resource_2"),
0);
kunit_cleanup(test);
KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
}
static int kunit_resource_test_init(struct kunit *test)
{
struct kunit_test_resource_context *ctx =
kzalloc(sizeof(*ctx), GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
test->priv = ctx;
kunit_init_test(&ctx->test, "test_test_context", NULL);
return 0;
}
static void kunit_resource_test_exit(struct kunit *test)
{
struct kunit_test_resource_context *ctx = test->priv;
kunit_cleanup(&ctx->test);
kfree(ctx);
}
static struct kunit_case kunit_resource_test_cases[] = {
KUNIT_CASE(kunit_resource_test_init_resources),
KUNIT_CASE(kunit_resource_test_alloc_resource),
KUNIT_CASE(kunit_resource_test_destroy_resource),
KUNIT_CASE(kunit_resource_test_remove_resource),
KUNIT_CASE(kunit_resource_test_cleanup_resources),
KUNIT_CASE(kunit_resource_test_proper_free_ordering),
KUNIT_CASE(kunit_resource_test_static),
KUNIT_CASE(kunit_resource_test_named),
{}
};
static struct kunit_suite kunit_resource_test_suite = {
.name = "kunit-resource-test",
.init = kunit_resource_test_init,
.exit = kunit_resource_test_exit,
.test_cases = kunit_resource_test_cases,
};
static void kunit_log_test(struct kunit *test);
static struct kunit_case kunit_log_test_cases[] = {
KUNIT_CASE(kunit_log_test),
{}
};
static struct kunit_suite kunit_log_test_suite = {
.name = "kunit-log-test",
.test_cases = kunit_log_test_cases,
};
static void kunit_log_test(struct kunit *test)
{
struct kunit_suite suite;
suite.log = kunit_kzalloc(test, KUNIT_LOG_SIZE, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, suite.log);
kunit_log(KERN_INFO, test, "put this in log.");
kunit_log(KERN_INFO, test, "this too.");
kunit_log(KERN_INFO, &suite, "add to suite log.");
kunit_log(KERN_INFO, &suite, "along with this.");
#ifdef CONFIG_KUNIT_DEBUGFS
KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
strstr(test->log, "put this in log."));
KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
strstr(test->log, "this too."));
KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
strstr(suite.log, "add to suite log."));
KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
strstr(suite.log, "along with this."));
#else
KUNIT_EXPECT_NULL(test, test->log);
#endif
}
static void kunit_status_set_failure_test(struct kunit *test)
{
struct kunit fake;
kunit_init_test(&fake, "fake test", NULL);
KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_SUCCESS);
kunit_set_failure(&fake);
KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_FAILURE);
}
static void kunit_status_mark_skipped_test(struct kunit *test)
{
struct kunit fake;
kunit_init_test(&fake, "fake test", NULL);
/* Before: Should be SUCCESS with no comment. */
KUNIT_EXPECT_EQ(test, fake.status, KUNIT_SUCCESS);
KUNIT_EXPECT_STREQ(test, fake.status_comment, "");
/* Mark the test as skipped. */
kunit_mark_skipped(&fake, "Accepts format string: %s", "YES");
/* After: Should be SKIPPED with our comment. */
KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_SKIPPED);
KUNIT_EXPECT_STREQ(test, fake.status_comment, "Accepts format string: YES");
}
static struct kunit_case kunit_status_test_cases[] = {
KUNIT_CASE(kunit_status_set_failure_test),
KUNIT_CASE(kunit_status_mark_skipped_test),
{}
};
static struct kunit_suite kunit_status_test_suite = {
.name = "kunit_status",
.test_cases = kunit_status_test_cases,
};
kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite,
&kunit_log_test_suite, &kunit_status_test_suite);
MODULE_LICENSE("GPL v2");
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