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

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Date:   Wed, 2 Feb 2022 17:48:56 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Suzuki K Poulose <suzuki.poulose@....com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "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 Wed, Feb 2, 2022 at 5:46 PM Suzuki K Poulose <suzuki.poulose@....com> wrote:
>
> 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!