Re: [PATCH 1/3] hisi_acc_vfio_pci: extract public functions for container_of

[Zhi Wang]

On Thu, 25 Jan 2024 16:10:29 +0800
Longfang Liu <liulongfang@xxxxxxxxxx> wrote:

> In the current driver, vdev is obtained from struct
> hisi_acc_vf_core_device through the container_of function.
> This method is used in many places in the driver. In order to
> reduce this repetitive operation, I extracted a public function
> to replace it.
> 
It is better to use the passive voice in the patch comment.
> Signed-off-by: Longfang Liu <liulongfang@xxxxxxxxxx>
> ---
>  .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c    | 21
> ++++++++++--------- 1 file changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c index
> f4b38a243aa7..5f6e01571a7b 100644 ---
> a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c +++
> b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c @@ -641,6 +641,12 @@
> static void hisi_acc_vf_disable_fds(struct hisi_acc_vf_core_device
> *hisi_acc_vde } }
>  
> +static struct hisi_acc_vf_core_device *hisi_acc_get_vf_dev(struct
> vfio_device *vdev) +{
> +	return container_of(vdev, struct hisi_acc_vf_core_device,
> +			    core_device.vdev);
> +}
> +
>  /*
>   * This function is called in all state_mutex unlock cases to
>   * handle a 'deferred_reset' if exists.
> @@ -1064,8 +1070,7 @@ static struct file *
>  hisi_acc_vfio_pci_set_device_state(struct vfio_device *vdev,
>  				   enum vfio_device_mig_state
> new_state) {
> -	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> container_of(vdev,
> -			struct hisi_acc_vf_core_device,
> core_device.vdev);
> +	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> hisi_acc_get_vf_dev(vdev); enum vfio_device_mig_state next_state;
>  	struct file *res = NULL;
>  	int ret;
> @@ -1106,8 +1111,7 @@ static int
>  hisi_acc_vfio_pci_get_device_state(struct vfio_device *vdev,
>  				   enum vfio_device_mig_state
> *curr_state) {
> -	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> container_of(vdev,
> -			struct hisi_acc_vf_core_device,
> core_device.vdev);
> +	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> hisi_acc_get_vf_dev(vdev); 
>  	mutex_lock(&hisi_acc_vdev->state_mutex);
>  	*curr_state = hisi_acc_vdev->mig_state;
> @@ -1323,8 +1327,7 @@ static long hisi_acc_vfio_pci_ioctl(struct
> vfio_device *core_vdev, unsigned int 
>  static int hisi_acc_vfio_pci_open_device(struct vfio_device
> *core_vdev) {
> -	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> container_of(core_vdev,
> -			struct hisi_acc_vf_core_device,
> core_device.vdev);
> +	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> hisi_acc_get_vf_dev(core_vdev); struct vfio_pci_core_device *vdev =
> &hisi_acc_vdev->core_device; int ret;
>  
> @@ -1347,8 +1350,7 @@ static int hisi_acc_vfio_pci_open_device(struct
> vfio_device *core_vdev) 
>  static void hisi_acc_vfio_pci_close_device(struct vfio_device
> *core_vdev) {
> -	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> container_of(core_vdev,
> -			struct hisi_acc_vf_core_device,
> core_device.vdev);
> +	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> hisi_acc_get_vf_dev(core_vdev); struct hisi_qm *vf_qm =
> &hisi_acc_vdev->vf_qm; 
>  	iounmap(vf_qm->io_base);
> @@ -1363,8 +1365,7 @@ static const struct vfio_migration_ops
> hisi_acc_vfio_pci_migrn_state_ops = { 
>  static int hisi_acc_vfio_pci_migrn_init_dev(struct vfio_device
> *core_vdev) {
> -	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> container_of(core_vdev,
> -			struct hisi_acc_vf_core_device,
> core_device.vdev);
> +	struct hisi_acc_vf_core_device *hisi_acc_vdev =
> hisi_acc_get_vf_dev(core_vdev); struct pci_dev *pdev =
> to_pci_dev(core_vdev->dev); struct hisi_qm *pf_qm =
> hisi_acc_get_pf_qm(pdev);