From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Linux ACPI <linux-acpi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux PM <linux-pm@vger.kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Hans de Goede <hdegoede@redhat.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Andreas Noever <andreas.noever@gmail.com>,
Michael Jamet <michael.jamet@intel.com>,
Yehezkel Bernat <YehezkelShB@gmail.com>,
linux-usb@vger.kernel.org,
Heikki Krogerus <heikki.krogerus@linux.intel.com>
Subject: Re: [PATCH v2 04/16] thunderbolt: ACPI: Replace tb_acpi_find_port() with acpi_find_child_by_adr()
Date: Mon, 13 Jun 2022 21:55:06 +0300 [thread overview]
Message-ID: <YqeICh2mrZP1LX9n@smile.fi.intel.com> (raw)
In-Reply-To: <2851774.e9J7NaK4W3@kreacher>
On Mon, Jun 13, 2022 at 08:11:36PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> Use acpi_find_child_by_adr() to find the child matching a given bus
> address instead of tb_acpi_find_port() that walks the list of children
> of an ACPI device directly for this purpose and drop the latter.
>
> Apart from simplifying the code, this will help to eliminate the
> children list head from struct acpi_device as it is redundant and it
> is used in questionable ways in some places (in particular, locking is
> needed for walking the list pointed to it safely, but it is often
> missing).
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>
> v1 -> v2:
> * Drop tb_acpi_find_port() (Heikki, Andy).
> * Change the subject accordingly
>
> ---
> drivers/thunderbolt/acpi.c | 27 ++++-----------------------
> 1 file changed, 4 insertions(+), 23 deletions(-)
>
> Index: linux-pm/drivers/thunderbolt/acpi.c
> ===================================================================
> --- linux-pm.orig/drivers/thunderbolt/acpi.c
> +++ linux-pm/drivers/thunderbolt/acpi.c
> @@ -301,26 +301,6 @@ static bool tb_acpi_bus_match(struct dev
> return tb_is_switch(dev) || tb_is_usb4_port_device(dev);
> }
>
> -static struct acpi_device *tb_acpi_find_port(struct acpi_device *adev,
> - const struct tb_port *port)
> -{
> - struct acpi_device *port_adev;
> -
> - if (!adev)
> - return NULL;
> -
> - /*
> - * Device routers exists under the downstream facing USB4 port
> - * of the parent router. Their _ADR is always 0.
> - */
> - list_for_each_entry(port_adev, &adev->children, node) {
> - if (acpi_device_adr(port_adev) == port->port)
> - return port_adev;
> - }
> -
> - return NULL;
> -}
> -
> static struct acpi_device *tb_acpi_switch_find_companion(struct tb_switch *sw)
> {
> struct acpi_device *adev = NULL;
> @@ -331,7 +311,8 @@ static struct acpi_device *tb_acpi_switc
> struct tb_port *port = tb_port_at(tb_route(sw), parent_sw);
> struct acpi_device *port_adev;
>
> - port_adev = tb_acpi_find_port(ACPI_COMPANION(&parent_sw->dev), port);
> + port_adev = acpi_find_child_by_adr(ACPI_COMPANION(&parent_sw->dev),
> + port->port);
> if (port_adev)
> adev = acpi_find_child_device(port_adev, 0, false);
> } else {
> @@ -364,8 +345,8 @@ static struct acpi_device *tb_acpi_find_
> if (tb_is_switch(dev))
> return tb_acpi_switch_find_companion(tb_to_switch(dev));
> else if (tb_is_usb4_port_device(dev))
> - return tb_acpi_find_port(ACPI_COMPANION(dev->parent),
> - tb_to_usb4_port_device(dev)->port);
> + return acpi_find_child_by_adr(ACPI_COMPANION(dev->parent),
> + tb_to_usb4_port_device(dev)->port->port);
> return NULL;
> }
>
>
>
>
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2022-06-13 20:17 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-09 13:44 [PATCH v1 00/16] ACPI: Get rid of the list of children in struct acpi_device Rafael J. Wysocki
2022-06-09 13:47 ` [PATCH v1 01/16] ACPI: glue: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-09 13:49 ` [PATCH v1 02/16] ACPI: glue: Introduce acpi_dev_has_children() Rafael J. Wysocki
2022-06-09 13:54 ` [PATCH v1 03/16] ACPI: glue: Introduce acpi_find_child_by_adr() Rafael J. Wysocki
2022-06-09 13:54 ` [PATCH v1 04/16] thunderbolt: ACPI: Use acpi_find_child_by_adr() Rafael J. Wysocki
2022-06-09 15:25 ` Andy Shevchenko
2022-06-09 15:36 ` Rafael J. Wysocki
2022-06-10 6:46 ` Heikki Krogerus
2022-06-10 13:12 ` Rafael J. Wysocki
2022-06-09 13:56 ` [PATCH v1 05/16] USB: " Rafael J. Wysocki
2022-06-09 15:27 ` Andy Shevchenko
2022-06-09 15:37 ` Rafael J. Wysocki
2022-06-10 6:47 ` Heikki Krogerus
2022-06-10 13:14 ` Rafael J. Wysocki
2022-06-09 13:58 ` [PATCH v1 06/16] ACPI: container: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-09 15:29 ` Andy Shevchenko
2022-06-09 15:58 ` Rafael J. Wysocki
2022-06-09 13:59 ` [PATCH v1 07/16] ACPI: property: Use acpi_dev_for_each_child() for child lookup Rafael J. Wysocki
2022-06-09 14:02 ` [PATCH v1 08/16] ACPI: bus: Export acpi_dev_for_each_child() to modules Rafael J. Wysocki
2022-06-09 14:03 ` [PATCH v1 09/16] ACPI: video: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-09 15:40 ` Andy Shevchenko
2022-06-09 14:06 ` [PATCH v1 10/16] ACPI: bus: Introduce acpi_dev_for_each_child_reverse() Rafael J. Wysocki
2022-06-09 15:40 ` Andy Shevchenko
2022-06-09 14:07 ` [PATCH v1 11/16] ACPI: scan: Walk ACPI device's children using driver core Rafael J. Wysocki
2022-06-09 14:09 ` [PATCH v1 12/16] platform/x86/thinkpad_acpi: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-09 15:48 ` Andy Shevchenko
2022-06-09 15:56 ` Rafael J. Wysocki
2022-06-09 14:12 ` [PATCH v1 13/16] mfd: core: " Rafael J. Wysocki
2022-06-09 14:16 ` [PATCH v1 14/16] soundwire: " Rafael J. Wysocki
2022-06-09 15:22 ` Pierre-Louis Bossart
2022-06-09 16:13 ` Rafael J. Wysocki
2022-06-09 16:21 ` Pierre-Louis Bossart
2022-06-09 17:35 ` Rafael J. Wysocki
2022-06-09 19:08 ` Pierre-Louis Bossart
2022-06-09 14:18 ` [PATCH v1 15/16] ACPI / MMC: PM: Unify fixing up device power Rafael J. Wysocki
2022-06-09 15:33 ` Adrian Hunter
2022-06-10 12:16 ` Ulf Hansson
2022-06-09 14:19 ` [PATCH v1 16/16] ACPI: bus: Drop unused list heads from struct acpi_device Rafael J. Wysocki
2022-06-09 15:12 ` [PATCH v1 00/16] ACPI: Get rid of the list of children in " Andy Shevchenko
2022-06-09 20:24 ` Frank Rowand
2022-06-09 15:56 ` Andy Shevchenko
2022-06-09 15:59 ` Rafael J. Wysocki
2022-06-13 18:03 ` [PATCH v2 " Rafael J. Wysocki
2022-06-13 18:05 ` [PATCH v2 01/16] ACPI: glue: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-13 18:06 ` [PATCH v2 02/16] ACPI: glue: Introduce acpi_dev_has_children() Rafael J. Wysocki
2022-06-13 18:10 ` [PATCH v2 03/16] ACPI: glue: Introduce acpi_find_child_by_adr() Rafael J. Wysocki
2022-06-13 18:11 ` [PATCH v2 04/16] thunderbolt: ACPI: Replace tb_acpi_find_port() with acpi_find_child_by_adr() Rafael J. Wysocki
2022-06-13 18:55 ` Andy Shevchenko [this message]
2022-06-14 6:07 ` Mika Westerberg
2022-06-14 18:25 ` Rafael J. Wysocki
2022-06-15 6:27 ` Mika Westerberg
2022-06-15 19:52 ` Rafael J. Wysocki
2022-06-14 7:36 ` Heikki Krogerus
2022-06-13 18:15 ` [PATCH v2 06/16] ACPI: container: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-13 18:16 ` [PATCH v2 07/16] ACPI: property: Use acpi_dev_for_each_child() for child lookup Rafael J. Wysocki
2022-06-13 18:26 ` [PATCH v2 08/16] ACPI: bus: Export acpi_dev_for_each_child() to modules Rafael J. Wysocki
2022-06-13 18:26 ` [PATCH v2 09/16] ACPI: video: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-13 18:26 ` [PATCH v2 10/16] ACPI: bus: Introduce acpi_dev_for_each_child_reverse() Rafael J. Wysocki
2022-06-13 18:27 ` [PATCH v2 11/16] ACPI: scan: Walk ACPI device's children using driver core Rafael J. Wysocki
2022-06-13 18:30 ` [PATCH v2 12/16] platform/x86/thinkpad_acpi: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-13 18:54 ` Andy Shevchenko
2022-06-13 20:50 ` Hans de Goede
2022-06-13 18:31 ` [PATCH v2 13/16] mfd: core: " Rafael J. Wysocki
2022-06-15 22:39 ` Lee Jones
2022-06-16 17:31 ` Rafael J. Wysocki
2022-06-27 11:38 ` [GIT PULL] Immutable branch between MFD and ACPI due for the v5.20 merge window Lee Jones
2022-06-27 12:15 ` Rafael J. Wysocki
2022-06-13 18:35 ` [PATCH v2 14/16] soundwire: Use acpi_dev_for_each_child() Rafael J. Wysocki
2022-06-23 8:10 ` Vinod Koul
2022-06-23 12:29 ` Rafael J. Wysocki
2022-06-23 12:41 ` Vinod Koul
2022-06-23 13:26 ` Rafael J. Wysocki
2022-06-13 18:36 ` [PATCH v2 15/16] ACPI / MMC: PM: Unify fixing up device power Rafael J. Wysocki
2022-06-13 18:38 ` [PATCH v2 16/16] ACPI: bus: Drop unused list heads from struct acpi_device Rafael J. Wysocki
2022-06-13 18:39 ` [PATCH v2 05/16] USB: ACPI: Replace usb_acpi_find_port() with acpi_find_child_by_adr() Rafael J. Wysocki
2022-06-13 18:53 ` Andy Shevchenko
2022-06-14 7:37 ` Heikki Krogerus
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