linux-kernel - Re: [PATCH] hwtracing: coresight: Replace acpi_bus_get

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Date:   Wed, 2 Feb 2022 16:46:35 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH] hwtracing: coresight: Replace acpi_bus_get_device()

On 02/02/2022 13:44, Rafael J. Wysocki wrote:
> On Wed, Feb 2, 2022 at 12:43 PM Suzuki K Poulose <suzuki.poulose@....com> wrote:
>>
>> Hi Rafael
>>
>> On 01/02/2022 17:58, Rafael J. Wysocki wrote:
>>> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>>>
>>> Replace acpi_bus_get_device() that is going to be dropped with
>>> acpi_fetch_acpi_dev().
>>>
>>> No intentional functional impact.
>>>
>>> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>>
>>
>>> ---
>>>    drivers/hwtracing/coresight/coresight-platform.c |    8 ++++----
>>>    1 file changed, 4 insertions(+), 4 deletions(-)
>>>
>>> Index: linux-pm/drivers/hwtracing/coresight/coresight-platform.c
>>> ===================================================================
>>> --- linux-pm.orig/drivers/hwtracing/coresight/coresight-platform.c
>>> +++ linux-pm/drivers/hwtracing/coresight/coresight-platform.c
>>> @@ -626,7 +626,7 @@ static int acpi_coresight_parse_link(str
>>>                                     const union acpi_object *link,
>>>                                     struct coresight_connection *conn)
>>>    {
>>> -     int rc, dir;
>>> +     int dir;
>>>        const union acpi_object *fields;
>>>        struct acpi_device *r_adev;
>>>        struct device *rdev;
>>> @@ -643,9 +643,9 @@ static int acpi_coresight_parse_link(str
>>>            fields[3].type != ACPI_TYPE_INTEGER)
>>>                return -EINVAL;
>>>
>>> -     rc = acpi_bus_get_device(fields[2].reference.handle, &r_adev);
>>> -     if (rc)
>>> -             return rc;
>>> +     r_adev = acpi_fetch_acpi_dev(fields[2].reference.handle);
>>> +     if (!r_adev)
>>> +             return -ENODEV;
>>>
>>
>> Is this patch part of a series ?
> 
> No, it isn't.
> 
>> I don't see acpi_fetch_acpi_dev() in v5.17-rc1, which our tree is based on at the moment.
> 
> acpi_fetch_acpi_dev() is there in v5.17-rc1.  Please see
> 
> https://elixir.bootlin.com/linux/v5.17-rc1/A/ident/acpi_fetch_acpi_dev
> 
>> Please could you point us to the changes ?
>>
>> Also do you expect to pull this via your tree ?
> 
> I can route it via the ACPI tree, but it may as well be routed along
> with other coresight-platform.c changes, if any.

Apologies, obviously, I was looking at the wrong tree. I will queue this

Thanks
Suzuki