linux-kernel - [PATCH 1/7] PCI: tegra: replace devm_request_and_ioremap by devm_ioremap

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Date:	Mon, 19 Aug 2013 13:20:35 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	kernel-janitors@...r.kernel.org,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Stephen Warren <swarren@...dotorg.org>,
	linux-tegra@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] PCI: tegra: replace devm_request_and_ioremap by devm_ioremap_resource

From: Julia Lawall <Julia.Lawall@...6.fr>

Use devm_ioremap_resource instead of devm_request_and_ioremap.

This was done using the semantic patch
scripts/coccinelle/api/devm_ioremap_resource.cocci

Error-handling code was manually removed from the associated calls to
platform_get_resource.

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
The first block of modified code is followed by a call to
devm_request_mem_region for pcie->cs with no associated ioremap.  Should
ioremap be used in this case as well?

 drivers/pci/host/pci-tegra.c |   29 +++++++++--------------------
 1 file changed, 9 insertions(+), 20 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 7356741..db2ddc5 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -1031,28 +1031,17 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 		return err;
 	}
 
-	/* request and remap controller registers */
 	pads = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pads");
-	if (!pads) {
-		err = -EADDRNOTAVAIL;
+	pcie->pads = devm_ioremap_resource(&pdev->dev, pads);
+	if (IS_ERR(pcie->pads)) {
+		err = PTR_ERR(pcie->pads);
 		goto poweroff;
 	}
 
 	afi = platform_get_resource_byname(pdev, IORESOURCE_MEM, "afi");
-	if (!afi) {
-		err = -EADDRNOTAVAIL;
-		goto poweroff;
-	}
-
-	pcie->pads = devm_request_and_ioremap(&pdev->dev, pads);
-	if (!pcie->pads) {
-		err = -EADDRNOTAVAIL;
-		goto poweroff;
-	}
-
-	pcie->afi = devm_request_and_ioremap(&pdev->dev, afi);
-	if (!pcie->afi) {
-		err = -EADDRNOTAVAIL;
+	pcie->afi = devm_ioremap_resource(&pdev->dev, afi);
+	if (IS_ERR(pcie->afi)) {
+		err = PTR_ERR(pcie->afi);
 		goto poweroff;
 	}
 
@@ -1492,9 +1481,9 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 		rp->lanes = value;
 		rp->pcie = pcie;
 
-		rp->base = devm_request_and_ioremap(pcie->dev, &rp->regs);
-		if (!rp->base)
-			return -EADDRNOTAVAIL;
+		rp->base = devm_ioremap_resource(pcie->dev, &rp->regs);
+		if (IS_ERR(rp->base))
+			return PTR_ERR(rp->base);
 
 		list_add_tail(&rp->list, &pcie->ports);
 	}

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