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From:   Markus Elfring <Markus.Elfring@web.de>
Subject: [PATCH] PCI: dwc: Use PTR_ERR_OR_ZERO() in five functions
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Cc:     LKML <linux-kernel@vger.kernel.org>,
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        YueHaibing <yuehaibing@huawei.com>,
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Date:   Fri, 6 Sep 2019 20:50:07 +0200
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From: Markus Elfring <elfring@users.sourceforge.net>
Date: Fri, 6 Sep 2019 20:40:06 +0200

Simplify these function implementations by using a known function.

Generated by: scripts/coccinelle/api/ptr_ret.cocci

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
=2D--
 drivers/pci/controller/dwc/pci-exynos.c |  5 +----
 drivers/pci/controller/dwc/pci-meson.c  | 10 ++--------
 drivers/pci/controller/dwc/pcie-kirin.c | 10 ++--------
 3 files changed, 5 insertions(+), 20 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/control=
ler/dwc/pci-exynos.c
index cee5f2f590e2..b6ab1cc5d895 100644
=2D-- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -92,10 +92,7 @@ static int exynos5440_pcie_get_mem_resources(struct pla=
tform_device *pdev,

 	res =3D platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	ep->mem_res->elbi_base =3D devm_ioremap_resource(dev, res);
-	if (IS_ERR(ep->mem_res->elbi_base))
-		return PTR_ERR(ep->mem_res->elbi_base);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(ep->mem_res->elbi_base);
 }

 static int exynos5440_pcie_get_clk_resources(struct exynos_pcie *ep)
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controll=
er/dwc/pci-meson.c
index e35e9eaa50ee..713059918002 100644
=2D-- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -182,10 +182,7 @@ static int meson_pcie_get_mems(struct platform_device=
 *pdev,

 	/* Meson SoC has two PCI controllers use same phy register*/
 	mp->mem_res.phy_base =3D meson_pcie_get_mem_shared(pdev, mp, "phy");
-	if (IS_ERR(mp->mem_res.phy_base))
-		return PTR_ERR(mp->mem_res.phy_base);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(mp->mem_res.phy_base);
 }

 static void meson_pcie_power_on(struct meson_pcie *mp)
@@ -259,10 +256,7 @@ static int meson_pcie_probe_clocks(struct meson_pcie =
*mp)
 		return PTR_ERR(res->general_clk);

 	res->clk =3D meson_pcie_probe_clock(dev, "pcie", 0);
-	if (IS_ERR(res->clk))
-		return PTR_ERR(res->clk);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(res->clk);
 }

 static inline void meson_elb_writel(struct meson_pcie *mp, u32 val, u32 r=
eg)
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/control=
ler/dwc/pcie-kirin.c
index c19617a912bd..75b1f1dde747 100644
=2D-- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -138,10 +138,7 @@ static long kirin_pcie_get_clk(struct kirin_pcie *kir=
in_pcie,
 		return PTR_ERR(kirin_pcie->apb_sys_clk);

 	kirin_pcie->pcie_aclk =3D devm_clk_get(dev, "pcie_aclk");
-	if (IS_ERR(kirin_pcie->pcie_aclk))
-		return PTR_ERR(kirin_pcie->pcie_aclk);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(kirin_pcie->pcie_aclk);
 }

 static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
@@ -174,10 +171,7 @@ static long kirin_pcie_get_resource(struct kirin_pcie=
 *kirin_pcie,

 	kirin_pcie->sysctrl =3D
 		syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl");
-	if (IS_ERR(kirin_pcie->sysctrl))
-		return PTR_ERR(kirin_pcie->sysctrl);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(kirin_pcie->sysctrl);
 }

 static int kirin_pcie_phy_init(struct kirin_pcie *kirin_pcie)
=2D-
2.23.0