Re: [PATCH 4/9] drivers: ata: ahci_xgene: use devm_platform_ioremap_resource()

Bartlomiej Zolnierkiewicz
2019-08-20T13:45:19Z

On 8/20/19 2:35 PM, Enrico Weigelt, metux IT consult wrote:
> Use the new helper that wraps the calls to platform_get_resource()
> and devm_ioremap_resource() together.
>
> Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
> ---
> drivers/ata/ahci_xgene.c | 21 +++++++--------------
> 1 file changed, 7 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
> index 16246c8..5391f5d 100644
> --- a/drivers/ata/ahci_xgene.c
> +++ b/drivers/ata/ahci_xgene.c
> @@ -739,7 +739,6 @@ static int xgene_ahci_probe(struct platform_device *pdev)
> struct device *dev = &pdev->dev;
> struct ahci_host_priv *hpriv;
> struct xgene_ahci_context *ctx;
> - struct resource *res;
> const struct of_device_id *of_devid;
> enum xgene_ahci_version version = XGENE_AHCI_V1;
> const struct ata_port_info *ppi[] = { &xgene_ahci_v1_port_info,
> @@ -759,31 +758,25 @@ static int xgene_ahci_probe(struct platform_device *pdev)
> ctx->dev = dev;
>
> /* Retrieve the IP core resource */
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> - ctx->csr_core = devm_ioremap_resource(dev, res);
> + ctx->csr_core = devm_platform_ioremap_resource(pdev, 1);
> if (IS_ERR(ctx->csr_core))
> return PTR_ERR(ctx->csr_core);
>
> /* Retrieve the IP diagnostic resource */
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
> - ctx->csr_diag = devm_ioremap_resource(dev, res);
> + ctx->csr_diag = devm_platform_ioremap_resource(pdev, 2);
> if (IS_ERR(ctx->csr_diag))
> return PTR_ERR(ctx->csr_diag);
>
> /* Retrieve the IP AXI resource */
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
> - ctx->csr_axi = devm_ioremap_resource(dev, res);
> + ctx->csr_axi = devm_platform_ioremap_resource(pdev, 3);
> if (IS_ERR(ctx->csr_axi))
> return PTR_ERR(ctx->csr_axi);
>
> /* Retrieve the optional IP mux resource */
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
> - if (res) {
> - void __iomem *csr = devm_ioremap_resource(dev, res);
> - if (IS_ERR(csr))
> - return PTR_ERR(csr);
> -
> - ctx->csr_mux = csr;
> + ctx->csr_mux = csr = devm_platform_ioremap_resource(pdev, 4);

This conversion is incorrect - despite the resource being optional
we will get error message from devm_[platform_]ioremap_resource()
(it always prints an error on !res condition).

> + if (IS_ERR(ctx->csr_mux)) {
> + dev_info(&pdev->dev, "cant get ip mux resource (optional)");

No need for this message.

> + ctx->csr_mux = NULL;
> }
>
> of_devid = of_match_device(xgene_ahci_of_match, dev);

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics