If for any reason multiple profile handlers don't agree on the profile
return the custom profile.
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
drivers/acpi/platform_profile.c | 84 +++++++++++++++++++++------------
1 file changed, 53 insertions(+), 31 deletions(-)
diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index d8c2d195106c2..7861fccc2e58c 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -280,55 +280,77 @@ static ssize_t platform_profile_choices_show(struct device *dev,
return _commmon_choices_show(aggregate, buf);
}
-static ssize_t platform_profile_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+/**
+ * _aggregate_profiles - Aggregate the profiles for legacy sysfs interface
+ * @dev: The device
+ * @data: The profile to return
+ * Return: 0 on success, -errno on failure
+ */
+static int _aggregate_profiles(struct device *dev, void *data)
{
- enum platform_profile_option profile = PLATFORM_PROFILE_BALANCED;
+ enum platform_profile_option *profile = data;
+ enum platform_profile_option val;
int err;
- scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
- if (!cur_profile)
- return -ENODEV;
+ err = get_class_profile(dev, &val);
+ if (err)
+ return err;
- err = cur_profile->profile_get(cur_profile, &profile);
- if (err)
- return err;
- }
+ if (*profile != PLATFORM_PROFILE_LAST && *profile != val)
+ *profile = PLATFORM_PROFILE_CUSTOM;
+ else
+ *profile = val;
- /* Check that profile is valid index */
- if (WARN_ON((profile < 0) || (profile >= ARRAY_SIZE(profile_names))))
- return -EIO;
+ return 0;
+}
+
+/**
+ * platform_profile_show - Show the current profile for legacy sysfs interface
+ * @dev: The device
+ * @attr: The attribute
+ * @buf: The buffer to write to
+ * Return: The number of bytes written
+ */
+static ssize_t platform_profile_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ enum platform_profile_option profile = PLATFORM_PROFILE_LAST;
+ int err;
+
+ err = class_for_each_device(&platform_profile_class, NULL,
+ &profile, _aggregate_profiles);
return sysfs_emit(buf, "%s\n", profile_names[profile]);
}
+/**
+ * platform_profile_store - Set the profile for legacy sysfs interface
+ * @dev: The device
+ * @attr: The attribute
+ * @buf: The buffer to read from
+ * @count: The number of bytes to read
+ * Return: The number of bytes read
+ */
static ssize_t platform_profile_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
- int err, i;
+ int ret;
+ int i;
/* Scan for a matching profile */
i = sysfs_match_string(profile_names, buf);
if (i < 0)
return -EINVAL;
-
- scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
- if (!cur_profile)
- return -ENODEV;
-
- /* Check that platform supports this profile choice */
- if (!test_bit(i, cur_profile->choices))
- return -EOPNOTSUPP;
-
- err = cur_profile->profile_set(cur_profile, i);
- if (err)
- return err;
+ if (i == PLATFORM_PROFILE_CUSTOM) {
+ pr_warn("Custom profile not supported for legacy sysfs interface\n");
+ return -EINVAL;
}
- sysfs_notify(acpi_kobj, NULL, "platform_profile");
- return count;
+ ret = class_for_each_device(&platform_profile_class, NULL, &i, _store_class_profile);
+
+ return ret ? ret : count;
}
static DEVICE_ATTR_RO(platform_profile_choices);
--
2.43.0Am 05.11.24 um 16:33 schrieb Mario Limonciello:
> If for any reason multiple profile handlers don't agree on the profile
> return the custom profile.
>
> Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
> drivers/acpi/platform_profile.c | 84 +++++++++++++++++++++------------
> 1 file changed, 53 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index d8c2d195106c2..7861fccc2e58c 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -280,55 +280,77 @@ static ssize_t platform_profile_choices_show(struct device *dev,
> return _commmon_choices_show(aggregate, buf);
> }
>
> -static ssize_t platform_profile_show(struct device *dev,
> - struct device_attribute *attr,
> - char *buf)
> +/**
> + * _aggregate_profiles - Aggregate the profiles for legacy sysfs interface
> + * @dev: The device
> + * @data: The profile to return
> + * Return: 0 on success, -errno on failure
> + */
> +static int _aggregate_profiles(struct device *dev, void *data)
> {
> - enum platform_profile_option profile = PLATFORM_PROFILE_BALANCED;
> + enum platform_profile_option *profile = data;
> + enum platform_profile_option val;
> int err;
>
> - scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
> - if (!cur_profile)
> - return -ENODEV;
> + err = get_class_profile(dev, &val);
> + if (err)
> + return err;
>
> - err = cur_profile->profile_get(cur_profile, &profile);
> - if (err)
> - return err;
> - }
> + if (*profile != PLATFORM_PROFILE_LAST && *profile != val)
> + *profile = PLATFORM_PROFILE_CUSTOM;
> + else
> + *profile = val;
>
> - /* Check that profile is valid index */
> - if (WARN_ON((profile < 0) || (profile >= ARRAY_SIZE(profile_names))))
> - return -EIO;
Please check the returned value from profile_get() first before doing
the custom platform
profile check.
> + return 0;
> +}
> +
> +/**
> + * platform_profile_show - Show the current profile for legacy sysfs interface
> + * @dev: The device
> + * @attr: The attribute
> + * @buf: The buffer to write to
> + * Return: The number of bytes written
> + */
> +static ssize_t platform_profile_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + enum platform_profile_option profile = PLATFORM_PROFILE_LAST;
> + int err;
> +
> + err = class_for_each_device(&platform_profile_class, NULL,
> + &profile, _aggregate_profiles);
Missing error handling.
>
> return sysfs_emit(buf, "%s\n", profile_names[profile]);
> }
>
> +/**
> + * platform_profile_store - Set the profile for legacy sysfs interface
> + * @dev: The device
> + * @attr: The attribute
> + * @buf: The buffer to read from
> + * @count: The number of bytes to read
> + * Return: The number of bytes read
> + */
> static ssize_t platform_profile_store(struct device *dev,
> - struct device_attribute *attr,
> - const char *buf, size_t count)
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> {
> - int err, i;
> + int ret;
> + int i;
>
> /* Scan for a matching profile */
> i = sysfs_match_string(profile_names, buf);
> if (i < 0)
> return -EINVAL;
> -
> - scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
> - if (!cur_profile)
> - return -ENODEV;
> -
> - /* Check that platform supports this profile choice */
> - if (!test_bit(i, cur_profile->choices))
> - return -EOPNOTSUPP;
> -
> - err = cur_profile->profile_set(cur_profile, i);
> - if (err)
> - return err;
> + if (i == PLATFORM_PROFILE_CUSTOM) {
> + pr_warn("Custom profile not supported for legacy sysfs interface\n");
This would allow userspace applications to spam the kernel log. Please
just return -EINVAL here
and document this special case inside the interface specification.
Thanks,
Armin Wolf
> + return -EINVAL;
> }
>
> - sysfs_notify(acpi_kobj, NULL, "platform_profile");
> - return count;
> + ret = class_for_each_device(&platform_profile_class, NULL, &i, _store_class_profile);
> +
> + return ret ? ret : count;
> }
>
> static DEVICE_ATTR_RO(platform_profile_choices);
On 11/6/2024 14:58, Armin Wolf wrote:
> Am 05.11.24 um 16:33 schrieb Mario Limonciello:
>
>> If for any reason multiple profile handlers don't agree on the profile
>> return the custom profile.
>>
>> Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
>> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
>> ---
>> drivers/acpi/platform_profile.c | 84 +++++++++++++++++++++------------
>> 1 file changed, 53 insertions(+), 31 deletions(-)
>>
>> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/
>> platform_profile.c
>> index d8c2d195106c2..7861fccc2e58c 100644
>> --- a/drivers/acpi/platform_profile.c
>> +++ b/drivers/acpi/platform_profile.c
>> @@ -280,55 +280,77 @@ static ssize_t
>> platform_profile_choices_show(struct device *dev,
>> return _commmon_choices_show(aggregate, buf);
>> }
>>
>> -static ssize_t platform_profile_show(struct device *dev,
>> - struct device_attribute *attr,
>> - char *buf)
>> +/**
>> + * _aggregate_profiles - Aggregate the profiles for legacy sysfs
>> interface
>> + * @dev: The device
>> + * @data: The profile to return
>> + * Return: 0 on success, -errno on failure
>> + */
>> +static int _aggregate_profiles(struct device *dev, void *data)
>> {
>> - enum platform_profile_option profile = PLATFORM_PROFILE_BALANCED;
>> + enum platform_profile_option *profile = data;
>> + enum platform_profile_option val;
>> int err;
>>
>> - scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
>> - if (!cur_profile)
>> - return -ENODEV;
>> + err = get_class_profile(dev, &val);
>> + if (err)
>> + return err;
>>
>> - err = cur_profile->profile_get(cur_profile, &profile);
>> - if (err)
>> - return err;
>> - }
>> + if (*profile != PLATFORM_PROFILE_LAST && *profile != val)
>> + *profile = PLATFORM_PROFILE_CUSTOM;
>> + else
>> + *profile = val;
>>
>> - /* Check that profile is valid index */
>> - if (WARN_ON((profile < 0) || (profile >=
>> ARRAY_SIZE(profile_names))))
>> - return -EIO;
>
> Please check the returned value from profile_get() first before doing
> the custom platform
> profile check.
You might have missed it - that's part of get_class_profile() already.
>
>> + return 0;
>> +}
>> +
>> +/**
>> + * platform_profile_show - Show the current profile for legacy sysfs
>> interface
>> + * @dev: The device
>> + * @attr: The attribute
>> + * @buf: The buffer to write to
>> + * Return: The number of bytes written
>> + */
>> +static ssize_t platform_profile_show(struct device *dev,
>> + struct device_attribute *attr,
>> + char *buf)
>> +{
>> + enum platform_profile_option profile = PLATFORM_PROFILE_LAST;
>> + int err;
>> +
>> + err = class_for_each_device(&platform_profile_class, NULL,
>> + &profile, _aggregate_profiles);
>
> Missing error handling.
>
Right, got it.
>>
>> return sysfs_emit(buf, "%s\n", profile_names[profile]);
>> }
>>
>> +/**
>> + * platform_profile_store - Set the profile for legacy sysfs interface
>> + * @dev: The device
>> + * @attr: The attribute
>> + * @buf: The buffer to read from
>> + * @count: The number of bytes to read
>> + * Return: The number of bytes read
>> + */
>> static ssize_t platform_profile_store(struct device *dev,
>> - struct device_attribute *attr,
>> - const char *buf, size_t count)
>> + struct device_attribute *attr,
>> + const char *buf, size_t count)
>> {
>> - int err, i;
>> + int ret;
>> + int i;
>>
>> /* Scan for a matching profile */
>> i = sysfs_match_string(profile_names, buf);
>> if (i < 0)
>> return -EINVAL;
>> -
>> - scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
>> - if (!cur_profile)
>> - return -ENODEV;
>> -
>> - /* Check that platform supports this profile choice */
>> - if (!test_bit(i, cur_profile->choices))
>> - return -EOPNOTSUPP;
>> -
>> - err = cur_profile->profile_set(cur_profile, i);
>> - if (err)
>> - return err;
>> + if (i == PLATFORM_PROFILE_CUSTOM) {
>> + pr_warn("Custom profile not supported for legacy sysfs
>> interface\n");
>
> This would allow userspace applications to spam the kernel log. Please
> just return -EINVAL here
> and document this special case inside the interface specification.
>
OK.
> Thanks,
> Armin Wolf
>
>> + return -EINVAL;
>> }
>>
>> - sysfs_notify(acpi_kobj, NULL, "platform_profile");
>> - return count;
>> + ret = class_for_each_device(&platform_profile_class, NULL, &i,
>> _store_class_profile);
>> +
>> + return ret ? ret : count;
>> }
>>
>> static DEVICE_ATTR_RO(platform_profile_choices);
Am 06.11.24 um 22:25 schrieb Mario Limonciello:
> On 11/6/2024 14:58, Armin Wolf wrote:
>> Am 05.11.24 um 16:33 schrieb Mario Limonciello:
>>
>>> If for any reason multiple profile handlers don't agree on the profile
>>> return the custom profile.
>>>
>>> Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
>>> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
>>> ---
>>> drivers/acpi/platform_profile.c | 84
>>> +++++++++++++++++++++------------
>>> 1 file changed, 53 insertions(+), 31 deletions(-)
>>>
>>> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/
>>> platform_profile.c
>>> index d8c2d195106c2..7861fccc2e58c 100644
>>> --- a/drivers/acpi/platform_profile.c
>>> +++ b/drivers/acpi/platform_profile.c
>>> @@ -280,55 +280,77 @@ static ssize_t
>>> platform_profile_choices_show(struct device *dev,
>>> return _commmon_choices_show(aggregate, buf);
>>> }
>>>
>>> -static ssize_t platform_profile_show(struct device *dev,
>>> - struct device_attribute *attr,
>>> - char *buf)
>>> +/**
>>> + * _aggregate_profiles - Aggregate the profiles for legacy sysfs
>>> interface
>>> + * @dev: The device
>>> + * @data: The profile to return
>>> + * Return: 0 on success, -errno on failure
>>> + */
>>> +static int _aggregate_profiles(struct device *dev, void *data)
>>> {
>>> - enum platform_profile_option profile = PLATFORM_PROFILE_BALANCED;
>>> + enum platform_profile_option *profile = data;
>>> + enum platform_profile_option val;
>>> int err;
>>>
>>> - scoped_cond_guard(mutex_intr, return -ERESTARTSYS,
>>> &profile_lock) {
>>> - if (!cur_profile)
>>> - return -ENODEV;
>>> + err = get_class_profile(dev, &val);
>>> + if (err)
>>> + return err;
>>>
>>> - err = cur_profile->profile_get(cur_profile, &profile);
>>> - if (err)
>>> - return err;
>>> - }
>>> + if (*profile != PLATFORM_PROFILE_LAST && *profile != val)
>>> + *profile = PLATFORM_PROFILE_CUSTOM;
>>> + else
>>> + *profile = val;
>>>
>>> - /* Check that profile is valid index */
>>> - if (WARN_ON((profile < 0) || (profile >=
>>> ARRAY_SIZE(profile_names))))
>>> - return -EIO;
>>
>> Please check the returned value from profile_get() first before doing
>> the custom platform
>> profile check.
>
> You might have missed it - that's part of get_class_profile() already.
>
You are right, my bad.
>>
>>> + return 0;
>>> +}
>>> +
>>> +/**
>>> + * platform_profile_show - Show the current profile for legacy
>>> sysfs interface
>>> + * @dev: The device
>>> + * @attr: The attribute
>>> + * @buf: The buffer to write to
>>> + * Return: The number of bytes written
>>> + */
>>> +static ssize_t platform_profile_show(struct device *dev,
>>> + struct device_attribute *attr,
>>> + char *buf)
>>> +{
>>> + enum platform_profile_option profile = PLATFORM_PROFILE_LAST;
>>> + int err;
>>> +
>>> + err = class_for_each_device(&platform_profile_class, NULL,
>>> + &profile, _aggregate_profiles);
>>
>> Missing error handling.
>>
>
> Right, got it.
>
>>>
>>> return sysfs_emit(buf, "%s\n", profile_names[profile]);
>>> }
>>>
>>> +/**
>>> + * platform_profile_store - Set the profile for legacy sysfs interface
>>> + * @dev: The device
>>> + * @attr: The attribute
>>> + * @buf: The buffer to read from
>>> + * @count: The number of bytes to read
>>> + * Return: The number of bytes read
>>> + */
>>> static ssize_t platform_profile_store(struct device *dev,
>>> - struct device_attribute *attr,
>>> - const char *buf, size_t count)
>>> + struct device_attribute *attr,
>>> + const char *buf, size_t count)
>>> {
>>> - int err, i;
>>> + int ret;
>>> + int i;
>>>
>>> /* Scan for a matching profile */
>>> i = sysfs_match_string(profile_names, buf);
>>> if (i < 0)
>>> return -EINVAL;
>>> -
>>> - scoped_cond_guard(mutex_intr, return -ERESTARTSYS,
>>> &profile_lock) {
>>> - if (!cur_profile)
>>> - return -ENODEV;
>>> -
>>> - /* Check that platform supports this profile choice */
>>> - if (!test_bit(i, cur_profile->choices))
>>> - return -EOPNOTSUPP;
>>> -
>>> - err = cur_profile->profile_set(cur_profile, i);
>>> - if (err)
>>> - return err;
>>> + if (i == PLATFORM_PROFILE_CUSTOM) {
>>> + pr_warn("Custom profile not supported for legacy sysfs
>>> interface\n");
>>
>> This would allow userspace applications to spam the kernel log. Please
>> just return -EINVAL here
>> and document this special case inside the interface specification.
>>
> OK.
>
>> Thanks,
>> Armin Wolf
>>
>>> + return -EINVAL;
>>> }
>>>
>>> - sysfs_notify(acpi_kobj, NULL, "platform_profile");
>>> - return count;
>>> + ret = class_for_each_device(&platform_profile_class, NULL, &i,
>>> _store_class_profile);
>>> +
>>> + return ret ? ret : count;
>>> }
>>>
>>> static DEVICE_ATTR_RO(platform_profile_choices);
>
>
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