Subject: Re: [PATCH v6 19/20] cxlflash: Use new cxl_pci_read_adapter_vpd() API

From: Manoj Kumar <[email-masked]>
Date: Fri, 4 Mar 2016 11:41:38 -0600

Fred:

Thanks for submitting this. Including linux-scsi.

Acked-by: Manoj N. Kumar <[email-masked]>

- Manoj

On 3/4/2016 5:26 AM, Frederic Barrat wrote:
> To read the adapter VPD, drivers can't rely on pci config APIs, as it
> wouldn't work on powerVM. cxl introduced a new kernel API especially
> for this, so start using it.
>
> Co-authored-by: Christophe Lombard <[email-masked]>
> Signed-off-by: Frederic Barrat <[email-masked]>
> Signed-off-by: Christophe Lombard <[email-masked]>
> ---
>   drivers/scsi/cxlflash/common.h |  1 -
>   drivers/scsi/cxlflash/main.c   | 18 ++----------------
>   2 files changed, 2 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h
> index 5ada926..580f370 100644
> --- a/drivers/scsi/cxlflash/common.h
> +++ b/drivers/scsi/cxlflash/common.h
> @@ -106,7 +106,6 @@ struct cxlflash_cfg {
>   	atomic_t scan_host_needed;
>
>   	struct cxl_afu *cxl_afu;
> -	struct pci_dev *parent_dev;
>
>   	atomic_t recovery_threads;
>   	struct mutex ctx_recovery_mutex;
> diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
> index f6d90ce..e04aae7 100644
> --- a/drivers/scsi/cxlflash/main.c
> +++ b/drivers/scsi/cxlflash/main.c
> @@ -1407,7 +1407,7 @@ static int start_context(struct cxlflash_cfg *cfg)
>    */
>   static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[])
>   {
> -	struct pci_dev *dev = cfg->parent_dev;
> +	struct pci_dev *dev = cfg->dev;
>   	int rc = 0;
>   	int ro_start, ro_size, i, j, k;
>   	ssize_t vpd_size;
> @@ -1416,7 +1416,7 @@ static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[])
>   	char *wwpn_vpd_tags[NUM_FC_PORTS] = { "V5", "V6" };
>
>   	/* Get the VPD data from the device */
> -	vpd_size = pci_read_vpd(dev, 0, sizeof(vpd_data), vpd_data);
> +	vpd_size = cxl_read_adapter_vpd(dev, vpd_data, sizeof(vpd_data));
>   	if (unlikely(vpd_size <= 0)) {
>   		dev_err(&dev->dev, "%s: Unable to read VPD (size = %ld)\n",
>   		       __func__, vpd_size);
> @@ -2392,7 +2392,6 @@ static int cxlflash_probe(struct pci_dev *pdev,
>   {
>   	struct Scsi_Host *host;
>   	struct cxlflash_cfg *cfg = NULL;
> -	struct device *phys_dev;
>   	struct dev_dependent_vals *ddv;
>   	int rc = 0;
>
> @@ -2458,19 +2457,6 @@ static int cxlflash_probe(struct pci_dev *pdev,
>
>   	pci_set_drvdata(pdev, cfg);
>
> -	/*
> -	 * Use the special service provided to look up the physical
> -	 * PCI device, since we are called on the probe of the virtual
> -	 * PCI host bus (vphb)
> -	 */
> -	phys_dev = cxl_get_phys_dev(pdev);
> -	if (!dev_is_pci(phys_dev)) {
> -		dev_err(&pdev->dev, "%s: not a pci dev\n", __func__);
> -		rc = -ENODEV;
> -		goto out_remove;
> -	}
> -	cfg->parent_dev = to_pci_dev(phys_dev);
> -
>   	cfg->cxl_afu = cxl_pci_to_afu(pdev);
>
>   	rc = init_pci(cfg);
>