[PATCH v1 21/23] ata: sata_dwc_460ex: use devm_ioremap

From: Andy Shevchenko
Date: Thu Apr 21 2016 - 14:18:19 EST


This simplifies error handling and cleanup by using devm to manage
IO mappings.

Signed-off-by: Mans Rullgard <mans@xxxxxxxxx>
---
drivers/ata/sata_dwc_460ex.c | 30 +++++++++++-------------------
1 file changed, 11 insertions(+), 19 deletions(-)

diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index 0ef72e4..44dca8c 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -139,7 +139,6 @@ struct sata_dwc_device {
struct device *dev; /* generic device struct */
struct ata_probe_ent *pe; /* ptr to probe-ent */
struct ata_host *host;
- u8 __iomem *reg_base;
struct sata_dwc_regs __iomem *sata_dwc_regs; /* DW SATA specific */
u32 sactive_issued;
u32 sactive_queued;
@@ -242,7 +241,7 @@ static int sata_dwc_dma_init_old(struct platform_device *pdev,
struct sata_dwc_device *hsdev)
{
struct device_node *np = pdev->dev.of_node;
- int err;
+ struct resource *res;

hsdev->dma = devm_kzalloc(&pdev->dev, sizeof(*hsdev->dma), GFP_KERNEL);
if (!hsdev->dma)
@@ -258,21 +257,16 @@ static int sata_dwc_dma_init_old(struct platform_device *pdev,
}

/* Get physical SATA DMA register base address */
- hsdev->dma->regs = of_iomap(np, 1);
- if (!hsdev->dma->regs) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ hsdev->dma->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hsdev->dma->regs)) {
dev_err(&pdev->dev,
"ioremap failed for AHBDMA register address\n");
- return -ENODEV;
+ return PTR_ERR(hsdev->dma->regs);
}

/* Initialize AHB DMAC */
- err = dw_dma_probe(hsdev->dma);
- if (err) {
- iounmap(hsdev->dma->regs);
- return err;
- }
-
- return 0;
+ return dw_dma_probe(hsdev->dma);
}

static void sata_dwc_dma_exit_old(struct sata_dwc_device *hsdev)
@@ -281,7 +275,6 @@ static void sata_dwc_dma_exit_old(struct sata_dwc_device *hsdev)
return;

dw_dma_remove(hsdev->dma);
- iounmap(hsdev->dma->regs);
}

#endif
@@ -1221,6 +1214,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
struct ata_port_info pi = sata_dwc_port_info[0];
const struct ata_port_info *ppi[] = { &pi, NULL };
struct device_node *np = ofdev->dev.of_node;
+ struct resource *res;

/* Allocate DWC SATA device */
host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_DWC_MAX_PORTS);
@@ -1231,13 +1225,13 @@ static int sata_dwc_probe(struct platform_device *ofdev)
host->private_data = hsdev;

/* Ioremap SATA registers */
- base = of_iomap(np, 0);
- if (!base) {
+ res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&ofdev->dev, res);
+ if (IS_ERR(base)) {
dev_err(&ofdev->dev,
"ioremap failed for SATA register address\n");
- return -ENODEV;
+ return PTR_ERR(base);
}
- hsdev->reg_base = base;
dev_dbg(&ofdev->dev, "ioremap done for SATA register address\n");

/* Synopsys DWC SATA specific Registers */
@@ -1302,7 +1296,6 @@ static int sata_dwc_probe(struct platform_device *ofdev)

error_out:
phy_exit(hsdev->phy);
- iounmap(base);
return err;
}

@@ -1321,7 +1314,6 @@ static int sata_dwc_remove(struct platform_device *ofdev)
sata_dwc_dma_exit_old(hsdev);
#endif

- iounmap(hsdev->reg_base);
dev_dbg(&ofdev->dev, "done\n");
return 0;
}
--
2.8.0.rc3