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Date: Wed, 12 Jun 2024 09:15:03 +0100
From: Martin Habets <habetsm.xilinx@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, Dave Ertman <david.m.ertman@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Bingbu Cao <bingbu.cao@intel.com>,
	Tianshu Qiu <tian.shu.qiu@intel.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Michael Chan <michael.chan@broadcom.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Jesse Brandeburg <jesse.brandeburg@intel.com>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	Saeed Mahameed <saeedm@nvidia.com>,
	Leon Romanovsky <leon@kernel.org>, Tariq Toukan <tariqt@nvidia.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Peter Ujfalusi <peter.ujfalusi@linux.intel.com>,
	Bard Liao <yung-chuan.liao@linux.intel.com>,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	Daniel Baluta <daniel.baluta@nxp.com>,
	Kai Vehmanen <kai.vehmanen@linux.intel.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>,
	Richard Cochran <richardcochran@gmail.com>,
	linux-media@vger.kernel.org, netdev@vger.kernel.org,
	intel-wired-lan@lists.osuosl.org, linux-rdma@vger.kernel.org,
	sound-open-firmware@alsa-project.org, linux-sound@vger.kernel.org
Subject: Re: [PATCH 1/6] auxbus: make to_auxiliary_drv accept and return a
 constant pointer
Message-ID: <20240612081503.GA8955@gmail.com>
Mail-Followup-To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org,
	Dave Ertman <david.m.ertman@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Bingbu Cao <bingbu.cao@intel.com>,
	Tianshu Qiu <tian.shu.qiu@intel.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Michael Chan <michael.chan@broadcom.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Jesse Brandeburg <jesse.brandeburg@intel.com>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	Saeed Mahameed <saeedm@nvidia.com>,
	Leon Romanovsky <leon@kernel.org>, Tariq Toukan <tariqt@nvidia.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Peter Ujfalusi <peter.ujfalusi@linux.intel.com>,
	Bard Liao <yung-chuan.liao@linux.intel.com>,
	Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
	Daniel Baluta <daniel.baluta@nxp.com>,
	Kai Vehmanen <kai.vehmanen@linux.intel.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>,
	Richard Cochran <richardcochran@gmail.com>,
	linux-media@vger.kernel.org, netdev@vger.kernel.org,
	intel-wired-lan@lists.osuosl.org, linux-rdma@vger.kernel.org,
	sound-open-firmware@alsa-project.org, linux-sound@vger.kernel.org
References: <20240611130103.3262749-7-gregkh@linuxfoundation.org>
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In-Reply-To: <20240611130103.3262749-7-gregkh@linuxfoundation.org>

On Tue, Jun 11, 2024 at 03:01:04PM +0200, Greg Kroah-Hartman wrote:
> In the quest to make struct device constant, start by making
> to_auziliary_drv() return a constant pointer so that drivers that call
> this can be fixed up before the driver core changes.
> 
> As the return type previously was not constant, also fix up all callers
> that were assuming that the pointer was not going to be a constant one
> in order to not break the build.
> 
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Dave Ertman <david.m.ertman@intel.com>
> Cc: Ira Weiny <ira.weiny@intel.com>
> Cc: "Rafael J. Wysocki" <rafael@kernel.org>
> Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
> Cc: Bingbu Cao <bingbu.cao@intel.com>
> Cc: Tianshu Qiu <tian.shu.qiu@intel.com>
> Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Michael Chan <michael.chan@broadcom.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
> Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
> Cc: Saeed Mahameed <saeedm@nvidia.com>
> Cc: Leon Romanovsky <leon@kernel.org>
> Cc: Tariq Toukan <tariqt@nvidia.com>
> Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Cc: Liam Girdwood <lgirdwood@gmail.com>
> Cc: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
> Cc: Bard Liao <yung-chuan.liao@linux.intel.com>
> Cc: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
> Cc: Daniel Baluta <daniel.baluta@nxp.com>
> Cc: Kai Vehmanen <kai.vehmanen@linux.intel.com>
> Cc: Mark Brown <broonie@kernel.org>
> Cc: Jaroslav Kysela <perex@perex.cz>
> Cc: Takashi Iwai <tiwai@suse.com>
> Cc: Richard Cochran <richardcochran@gmail.com>
> Cc: linux-media@vger.kernel.org
> Cc: netdev@vger.kernel.org
> Cc: intel-wired-lan@lists.osuosl.org
> Cc: linux-rdma@vger.kernel.org
> Cc: sound-open-firmware@alsa-project.org
> Cc: linux-sound@vger.kernel.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Reviewed-by: Martin Habets <habetsm.xilinx@gmail.com>

> ---
>  drivers/base/auxiliary.c                      | 8 ++++----
>  drivers/media/pci/intel/ipu6/ipu6-bus.h       | 2 +-
>  drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 4 ++--
>  drivers/net/ethernet/intel/ice/ice_ptp.c      | 2 +-
>  drivers/net/ethernet/mellanox/mlx5/core/dev.c | 4 ++--
>  include/linux/auxiliary_bus.h                 | 2 +-
>  sound/soc/sof/sof-client.c                    | 4 ++--
>  7 files changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/base/auxiliary.c b/drivers/base/auxiliary.c
> index d3a2c40c2f12..5832e31bb77b 100644
> --- a/drivers/base/auxiliary.c
> +++ b/drivers/base/auxiliary.c
> @@ -180,7 +180,7 @@ static const struct auxiliary_device_id *auxiliary_match_id(const struct auxilia
>  static int auxiliary_match(struct device *dev, struct device_driver *drv)
>  {
>  	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
> -	struct auxiliary_driver *auxdrv = to_auxiliary_drv(drv);
> +	const struct auxiliary_driver *auxdrv = to_auxiliary_drv(drv);
>  
>  	return !!auxiliary_match_id(auxdrv->id_table, auxdev);
>  }
> @@ -203,7 +203,7 @@ static const struct dev_pm_ops auxiliary_dev_pm_ops = {
>  
>  static int auxiliary_bus_probe(struct device *dev)
>  {
> -	struct auxiliary_driver *auxdrv = to_auxiliary_drv(dev->driver);
> +	const struct auxiliary_driver *auxdrv = to_auxiliary_drv(dev->driver);
>  	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
>  	int ret;
>  
> @@ -222,7 +222,7 @@ static int auxiliary_bus_probe(struct device *dev)
>  
>  static void auxiliary_bus_remove(struct device *dev)
>  {
> -	struct auxiliary_driver *auxdrv = to_auxiliary_drv(dev->driver);
> +	const struct auxiliary_driver *auxdrv = to_auxiliary_drv(dev->driver);
>  	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
>  
>  	if (auxdrv->remove)
> @@ -232,7 +232,7 @@ static void auxiliary_bus_remove(struct device *dev)
>  
>  static void auxiliary_bus_shutdown(struct device *dev)
>  {
> -	struct auxiliary_driver *auxdrv = NULL;
> +	const struct auxiliary_driver *auxdrv = NULL;
>  	struct auxiliary_device *auxdev;
>  
>  	if (dev->driver) {
> diff --git a/drivers/media/pci/intel/ipu6/ipu6-bus.h b/drivers/media/pci/intel/ipu6/ipu6-bus.h
> index b26c6aee1621..bb4926dfdf08 100644
> --- a/drivers/media/pci/intel/ipu6/ipu6-bus.h
> +++ b/drivers/media/pci/intel/ipu6/ipu6-bus.h
> @@ -21,7 +21,7 @@ struct ipu6_buttress_ctrl;
>  
>  struct ipu6_bus_device {
>  	struct auxiliary_device auxdev;
> -	struct auxiliary_driver *auxdrv;
> +	const struct auxiliary_driver *auxdrv;
>  	const struct ipu6_auxdrv_data *auxdrv_data;
>  	struct list_head list;
>  	void *pdata;
> diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
> index ba3fa1c2e5d9..b9e7d3e7b15d 100644
> --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
> +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
> @@ -239,7 +239,7 @@ void bnxt_ulp_stop(struct bnxt *bp)
>  
>  		adev = &aux_priv->aux_dev;
>  		if (adev->dev.driver) {
> -			struct auxiliary_driver *adrv;
> +			const struct auxiliary_driver *adrv;
>  			pm_message_t pm = {};
>  
>  			adrv = to_auxiliary_drv(adev->dev.driver);
> @@ -277,7 +277,7 @@ void bnxt_ulp_start(struct bnxt *bp, int err)
>  
>  		adev = &aux_priv->aux_dev;
>  		if (adev->dev.driver) {
> -			struct auxiliary_driver *adrv;
> +			const struct auxiliary_driver *adrv;
>  
>  			adrv = to_auxiliary_drv(adev->dev.driver);
>  			edev->en_state = bp->state;
> diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
> index 0f17fc1181d2..7341e7c4ef24 100644
> --- a/drivers/net/ethernet/intel/ice/ice_ptp.c
> +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
> @@ -2784,7 +2784,7 @@ static struct ice_pf *
>  ice_ptp_aux_dev_to_owner_pf(struct auxiliary_device *aux_dev)
>  {
>  	struct ice_ptp_port_owner *ports_owner;
> -	struct auxiliary_driver *aux_drv;
> +	const struct auxiliary_driver *aux_drv;
>  	struct ice_ptp *owner_ptp;
>  
>  	if (!aux_dev->dev.driver)
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
> index 47e7c2639774..9a79674d27f1 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/dev.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
> @@ -349,7 +349,7 @@ int mlx5_attach_device(struct mlx5_core_dev *dev)
>  {
>  	struct mlx5_priv *priv = &dev->priv;
>  	struct auxiliary_device *adev;
> -	struct auxiliary_driver *adrv;
> +	const struct auxiliary_driver *adrv;
>  	int ret = 0, i;
>  
>  	devl_assert_locked(priv_to_devlink(dev));
> @@ -406,7 +406,7 @@ void mlx5_detach_device(struct mlx5_core_dev *dev, bool suspend)
>  {
>  	struct mlx5_priv *priv = &dev->priv;
>  	struct auxiliary_device *adev;
> -	struct auxiliary_driver *adrv;
> +	const struct auxiliary_driver *adrv;
>  	pm_message_t pm = {};
>  	int i;
>  
> diff --git a/include/linux/auxiliary_bus.h b/include/linux/auxiliary_bus.h
> index de21d9d24a95..bdff7b85f2ae 100644
> --- a/include/linux/auxiliary_bus.h
> +++ b/include/linux/auxiliary_bus.h
> @@ -203,7 +203,7 @@ static inline struct auxiliary_device *to_auxiliary_dev(struct device *dev)
>  	return container_of(dev, struct auxiliary_device, dev);
>  }
>  
> -static inline struct auxiliary_driver *to_auxiliary_drv(struct device_driver *drv)
> +static inline const struct auxiliary_driver *to_auxiliary_drv(const struct device_driver *drv)
>  {
>  	return container_of(drv, struct auxiliary_driver, driver);
>  }
> diff --git a/sound/soc/sof/sof-client.c b/sound/soc/sof/sof-client.c
> index 99f74def4ab6..5d6005a88e79 100644
> --- a/sound/soc/sof/sof-client.c
> +++ b/sound/soc/sof/sof-client.c
> @@ -357,7 +357,7 @@ EXPORT_SYMBOL_NS_GPL(sof_client_ipc4_find_module, SND_SOC_SOF_CLIENT);
>  
>  int sof_suspend_clients(struct snd_sof_dev *sdev, pm_message_t state)
>  {
> -	struct auxiliary_driver *adrv;
> +	const struct auxiliary_driver *adrv;
>  	struct sof_client_dev *cdev;
>  
>  	mutex_lock(&sdev->ipc_client_mutex);
> @@ -380,7 +380,7 @@ EXPORT_SYMBOL_NS_GPL(sof_suspend_clients, SND_SOC_SOF_CLIENT);
>  
>  int sof_resume_clients(struct snd_sof_dev *sdev)
>  {
> -	struct auxiliary_driver *adrv;
> +	const struct auxiliary_driver *adrv;
>  	struct sof_client_dev *cdev;
>  
>  	mutex_lock(&sdev->ipc_client_mutex);
> -- 
> 2.45.2
>