From: Julia Lawall <Julia.Lawall@lip6.fr>
Date: Mon, 19 Aug 2013 08:51:53 +0000 (+0200)
Subject: mtd: fsmc_nand: simplify platform_get_resource_byname/devm_ioremap_resource
X-Git-Tag: firefly_0821_release~176^2~5370^2~22
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=44a417fa0fbf41a48f09cf90d06550764b530c0e;p=firefly-linux-kernel-4.4.55.git

mtd: fsmc_nand: simplify platform_get_resource_byname/devm_ioremap_resource

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

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

// <smpl>
@@
expression pdev,res,e,e1;
expression ret != 0;
identifier l;
@@

  res = platform_get_resource_byname(...);
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  e = devm_ioremap_resource(e1, res);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 2a3b1b90a562..3dc1a7564d87 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -958,9 +958,6 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 	}
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
-	if (!res)
-		return -EINVAL;
-
 	host->data_va = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->data_va))
 		return PTR_ERR(host->data_va);
@@ -968,25 +965,16 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
 	host->data_pa = (dma_addr_t)res->start;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_addr");
-	if (!res)
-		return -EINVAL;
-
 	host->addr_va = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->addr_va))
 		return PTR_ERR(host->addr_va);
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_cmd");
-	if (!res)
-		return -EINVAL;
-
 	host->cmd_va = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->cmd_va))
 		return PTR_ERR(host->cmd_va);
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fsmc_regs");
-	if (!res)
-		return -EINVAL;
-
 	host->regs_va = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->regs_va))
 		return PTR_ERR(host->regs_va);