Aug 14 2013

spi/spi-{bcm63xx.c,bfin-v3.c}: simplify use of devm_ioremap_resource 

Author: Julia Lawall <Julia.Lawall@lip6.fr>

Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.

Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more clear.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// 
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@

- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  ... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  ... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  e = devm_ioremap_resource(e1, res);
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Mark Brown 

---
 drivers/spi/spi-bcm63xx.c | 8 +-------
 drivers/spi/spi-bfin-v3.c | 8 +-------
 2 files changed, 2 insertions(+), 14 deletions(-)
 
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index 9fd7a39..a21fef4 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -360,13 +360,6 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
 	struct bcm63xx_spi *bs;
 	int ret;
 
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		dev_err(dev, "no iomem\n");
-		ret = -ENXIO;
-		goto out;
-	}
-
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(dev, "no irq\n");
@@ -393,6 +386,7 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, master);
 	bs->pdev = pdev;
 
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	bs->regs = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(bs->regs)) {
 		ret = PTR_ERR(bs->regs);
diff --git a/drivers/spi/spi-bfin-v3.c b/drivers/spi/spi-bfin-v3.c
index 603d7e9..d5bab00 100644
--- a/drivers/spi/spi-bfin-v3.c
+++ b/drivers/spi/spi-bfin-v3.c
@@ -792,13 +792,6 @@ static int bfin_spi_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
-	/* get register base and tx/rx dma */
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(dev, "can not get register base\n");
-		return -ENXIO;
-	}
-
 	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
 	if (!res) {
 		dev_err(dev, "can not get tx dma resource\n");
@@ -838,6 +831,7 @@ static int bfin_spi_probe(struct platform_device *pdev)
 	drv_data->pin_req = info->pin_req;
 	drv_data->sclk = sclk;
 
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	drv_data->regs = devm_ioremap_resource(dev, mem);
 	if (IS_ERR(drv_data->regs)) {
 		ret = PTR_ERR(drv_data->regs);

qlambert