linux-kernel - [RFC PATCH 06/35] PCI: Tidy Success/Failure checks

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Message-Id: <20200713122247.10985-7-refactormyself@gmail.com>
Date:   Mon, 13 Jul 2020 14:22:18 +0200
From:   "Saheed O. Bolarinwa" <refactormyself@...il.com>
To:     helgaas@...nel.org, Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Ley Foon Tan <ley.foon.tan@...el.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Toan Le <toan@...amperecomputing.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Yue Wang <yue.wang@...ogic.com>,
        Kevin Hilman <khilman@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     "Saheed O. Bolarinwa" <refactormyself@...il.com>,
        bjorn@...gaas.com, skhan@...uxfoundation.org,
        linux-pci@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org, rfi@...ts.rocketboards.org,
        linux-renesas-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org
Subject: [RFC PATCH 06/35] PCI: Tidy Success/Failure checks

Remove unnecessary check for 0.

Signed-off-by: "Saheed O. Bolarinwa" <refactormyself@...il.com>
---
This patch depends on PATCH 05/35

 drivers/pci/controller/dwc/pci-meson.c            | 2 +-
 drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
 drivers/pci/controller/pci-xgene.c                | 3 +--
 drivers/pci/controller/pcie-altera.c              | 4 ++--
 drivers/pci/controller/pcie-iproc.c               | 2 +-
 drivers/pci/controller/pcie-rcar-host.c           | 4 ++--
 6 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index 58142f03d300..8203d5f95d28 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -390,7 +390,7 @@ static int meson_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
 	int ret;
 
 	ret = dw_pcie_read(pci->dbi_base + where, size, val);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	/*
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 7c97c54f787c..2dd3965365f6 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -459,7 +459,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	}
 
 	ret = dw_pcie_rd_own_conf(pp, PCI_HEADER_TYPE, 1, &hdr_type);
-	if (ret != 0) {
+	if (ret) {
 		dev_err(pci->dev, "Failed reading PCI_HEADER_TYPE cfg space reg (ret: 0x%x)\n",
 			ret);
 		ret = pcibios_err_to_errno(ret);
diff --git a/drivers/pci/controller/pci-xgene.c b/drivers/pci/controller/pci-xgene.c
index bf74f0a8b451..8d55cfc4ff8a 100644
--- a/drivers/pci/controller/pci-xgene.c
+++ b/drivers/pci/controller/pci-xgene.c
@@ -167,8 +167,7 @@ static int xgene_pcie_config_read32(struct pci_bus *bus, unsigned int devfn,
 {
 	struct xgene_pcie_port *port = pcie_bus_to_port(bus);
 
-	if (pci_generic_config_read32(bus, devfn, where & ~0x3, 4, val) !=
-	    0)
+	if (pci_generic_config_read32(bus, devfn, where & ~0x3, 4, val))
 		return PCIBIOS_DEVICE_NOT_FOUND;
 
 	/*
diff --git a/drivers/pci/controller/pcie-altera.c b/drivers/pci/controller/pcie-altera.c
index 96f5bda32b58..9f7b12ad0c04 100644
--- a/drivers/pci/controller/pcie-altera.c
+++ b/drivers/pci/controller/pcie-altera.c
@@ -367,7 +367,7 @@ static int tlp_cfg_dword_write(struct altera_pcie *pcie, u8 bus, u32 devfn,
 						    value, false);
 
 	ret = pcie->pcie_data->ops->tlp_read_pkt(pcie, NULL);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	/*
@@ -453,7 +453,7 @@ static int _altera_pcie_cfg_read(struct altera_pcie *pcie, u8 busno,
 
 	ret = tlp_cfg_dword_read(pcie, busno, devfn,
 				 (where & ~DWORD_MASK), byte_en, &data);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	switch (size) {
diff --git a/drivers/pci/controller/pcie-iproc.c b/drivers/pci/controller/pcie-iproc.c
index dac9352c0cb2..d34c9457fbe4 100644
--- a/drivers/pci/controller/pcie-iproc.c
+++ b/drivers/pci/controller/pcie-iproc.c
@@ -584,7 +584,7 @@ static int iproc_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
 	/* root complex access */
 	if (busno == 0) {
 		ret = pci_generic_config_read32(bus, devfn, where, size, val);
-		if (ret == 0)
+		if (!ret)
 			iproc_pcie_fix_cap(pcie, where, val);
 
 		return ret;
diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index 363a8630de28..2bb250c6f767 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -157,7 +157,7 @@ static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
 
 	ret = rcar_pcie_config_access(host, RCAR_PCI_ACCESS_READ,
 				      bus, devfn, where, val);
-	if (ret != 0) {
+	if (ret) {
 		*val = 0xffffffff;
 		return ret;
 	}
@@ -184,7 +184,7 @@ static int rcar_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
 
 	ret = rcar_pcie_config_access(host, RCAR_PCI_ACCESS_READ,
 				      bus, devfn, where, &data);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	dev_dbg(&bus->dev, "pcie-config-write: bus=%3d devfn=0x%04x where=0x%04x size=%d val=0x%08x\n",
-- 
2.18.2