[RFC PATCH 08/35] PCI: Tidy Success/Failure checks

[Saheed O. Bolarinwa]

Remove unnecessary check for 0.

Signed-off-by: "Saheed O. Bolarinwa" <refactormyself@xxxxxxxxx>
---
This patch depends on PATCH 07/35

 drivers/pci/pci-bridge-emul.c      | 2 +-
 drivers/pci/pci.c                  | 8 ++++----
 drivers/pci/pcie/bw_notification.c | 4 ++--
 drivers/pci/probe.c                | 4 ++--
 drivers/pci/quirks.c               | 4 ++--
 drivers/pci/syscall.c              | 8 ++++----
 6 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c
index 9695c453e197..c270c18d5cf5 100644
--- a/drivers/pci/pci-bridge-emul.c
+++ b/drivers/pci/pci-bridge-emul.c
@@ -400,7 +400,7 @@ int pci_bridge_emul_conf_write(struct pci_bridge_emul *bridge, int where,
 		return PCIBIOS_BAD_REGISTER_NUMBER;
 
 	ret = pci_bridge_emul_conf_read(bridge, reg, 4, &old);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	if (bridge->has_pcie && reg >= PCI_CAP_PCIE_START) {
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index a74547861d5e..4b2a348576cb 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -185,7 +185,7 @@ int pci_status_get_and_clear_errors(struct pci_dev *pdev)
 	int ret;
 
 	ret = pci_read_config_word(pdev, PCI_STATUS, &status);
-	if (ret != 0)
+	if (ret)
 		return -EIO;
 
 	status &= PCI_STATUS_ERROR_BITS;
@@ -534,7 +534,7 @@ int pci_find_next_ext_capability(struct pci_dev *dev, int start, int cap)
 	if (start)
 		pos = start;
 
-	if (pci_read_config_dword(dev, pos, &header) != 0)
+	if (pci_read_config_dword(dev, pos, &header))
 		return 0;
 
 	/*
@@ -552,7 +552,7 @@ int pci_find_next_ext_capability(struct pci_dev *dev, int start, int cap)
 		if (pos < PCI_CFG_SPACE_SIZE)
 			break;
 
-		if (pci_read_config_dword(dev, pos, &header) != 0)
+		if (pci_read_config_dword(dev, pos, &header))
 			break;
 	}
 
@@ -628,7 +628,7 @@ static int __pci_find_next_ht_cap(struct pci_dev *dev, int pos, int ht_cap)
 				      PCI_CAP_ID_HT, &ttl);
 	while (pos) {
 		rc = pci_read_config_byte(dev, pos + 3, &cap);
-		if (rc != 0)
+		if (rc)
 			return 0;
 
 		if ((cap & mask) == ht_cap)
diff --git a/drivers/pci/pcie/bw_notification.c b/drivers/pci/pcie/bw_notification.c
index c7201d886026..f62c19ffedfc 100644
--- a/drivers/pci/pcie/bw_notification.c
+++ b/drivers/pci/pcie/bw_notification.c
@@ -23,7 +23,7 @@ static bool pcie_link_bandwidth_notification_supported(struct pci_dev *dev)
 	u32 lnk_cap;
 
 	ret = pcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &lnk_cap);
-	return (ret == 0) && (lnk_cap & PCI_EXP_LNKCAP_LBNC);
+	return (!ret) && (lnk_cap & PCI_EXP_LNKCAP_LBNC);
 }
 
 static void pcie_enable_link_bandwidth_notification(struct pci_dev *dev)
@@ -56,7 +56,7 @@ static irqreturn_t pcie_bw_notification_irq(int irq, void *context)
 	ret = pcie_capability_read_word(port, PCI_EXP_LNKSTA, &link_status);
 	events = link_status & PCI_EXP_LNKSTA_LBMS;
 
-	if (ret != 0 || !events)
+	if (ret || !events)
 		return IRQ_NONE;
 
 	pcie_capability_write_word(port, PCI_EXP_LNKSTA, events);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ab7e19882b30..60ecebbc7dcf 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1582,7 +1582,7 @@ static bool pci_ext_cfg_is_aliased(struct pci_dev *dev)
 
 	for (pos = PCI_CFG_SPACE_SIZE;
 	     pos < PCI_CFG_SPACE_EXP_SIZE; pos += PCI_CFG_SPACE_SIZE) {
-		if (pci_read_config_dword(dev, pos, &tmp) != 0
+		if (pci_read_config_dword(dev, pos, &tmp)
 		    || header != tmp)
 			return false;
 	}
@@ -1609,7 +1609,7 @@ static int pci_cfg_space_size_ext(struct pci_dev *dev)
 	u32 status;
 	int pos = PCI_CFG_SPACE_SIZE;
 
-	if (pci_read_config_dword(dev, pos, &status) != 0)
+	if (pci_read_config_dword(dev, pos, &status))
 		return PCI_CFG_SPACE_SIZE;
 	if (status == 0xffffffff || pci_ext_cfg_is_aliased(dev))
 		return PCI_CFG_SPACE_SIZE;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index e60ef8abd698..8b69d6ebb619 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5116,8 +5116,8 @@ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev)
 		pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD;
 
 		pdev->cfg_size = PCI_CFG_SPACE_EXP_SIZE;
-		if (pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &status) !=
-		    0 || (status == 0xffffffff))
+		if (pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &status)
+		     || (status == 0xffffffff))
 			pdev->cfg_size = PCI_CFG_SPACE_SIZE;
 
 		if (pci_find_saved_cap(pdev, PCI_CAP_ID_EXP))
diff --git a/drivers/pci/syscall.c b/drivers/pci/syscall.c
index 7d45b58beacd..a208700000ea 100644
--- a/drivers/pci/syscall.c
+++ b/drivers/pci/syscall.c
@@ -46,7 +46,7 @@ SYSCALL_DEFINE5(pciconfig_read, unsigned long, bus, unsigned long, dfn,
 	}
 
 	err = -EIO;
-	if (cfg_ret != 0)
+	if (cfg_ret)
 		goto error;
 
 	switch (len) {
@@ -105,7 +105,7 @@ SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn,
 		if (err)
 			break;
 		err = pci_user_write_config_byte(dev, off, byte);
-		if (err != 0)
+		if (err)
 			err = -EIO;
 		break;
 
@@ -114,7 +114,7 @@ SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn,
 		if (err)
 			break;
 		err = pci_user_write_config_word(dev, off, word);
-		if (err != 0)
+		if (err)
 			err = -EIO;
 		break;
 
@@ -123,7 +123,7 @@ SYSCALL_DEFINE5(pciconfig_write, unsigned long, bus, unsigned long, dfn,
 		if (err)
 			break;
 		err = pci_user_write_config_dword(dev, off, dword);
-		if (err != 0)
+		if (err)
 			err = -EIO;
 		break;
 
-- 
2.18.2