On Sun, Jun 28, 2015 at 04:52:16PM +0200, SF Markus Elfring wrote:

From: Markus Elfring <redacted>
Date: Sun, 28 Jun 2015 16:42:04 +0200

The functions phy_exit() and phy_power_off() test whether their argument
is NULL and then return immediately.
Thus the test around the calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <redacted>

I haven't seen a followup to Ray's review, but in the interest of making
progress, I updated and applied the patch as appended.  I also reviewed
other phy_*() calls under drivers/pci, and they all look OK (with no
unnecessary tests for NULL).

This is on the pci/host-iproc branch for v4.3.

commit 55b5e16332eb9ffc1cbaf975585f4521417ab427
Author: Markus Elfring [off-list ref]
Date:   Sun Jun 28 16:42:04 2015 +0200

    PCI: iproc: Delete unnecessary checks before phy calls
    
    The functions phy_exit() and phy_power_off() test whether their argument is
    NULL and then return immediately.  Thus the test around the calls is not
    needed.
    
    This issue was detected by using the Coccinelle software.
    
    [bhelgaas: also phy_init() and phy_power_on(), as Ray Jui suggested]
    [bhelgaas: also remove tests in iproc_pcie_remove()]
    Signed-off-by: Markus Elfring [off-list ref]
    Signed-off-by: Bjorn Helgaas [off-list ref]

diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c
index d77481e..9a00dca 100644
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c

@@ -191,19 +191,16 @@ int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
 	if (!pcie || !pcie->dev || !pcie->base)
 		return -EINVAL;
 
-	if (pcie->phy) {
-		ret = phy_init(pcie->phy);
-		if (ret) {
-			dev_err(pcie->dev, "unable to initialize PCIe PHY\n");
-			return ret;
-		}
-
-		ret = phy_power_on(pcie->phy);
-		if (ret) {
-			dev_err(pcie->dev, "unable to power on PCIe PHY\n");
-			goto err_exit_phy;
-		}
+	ret = phy_init(pcie->phy);
+	if (ret) {
+		dev_err(pcie->dev, "unable to initialize PCIe PHY\n");
+		return ret;
+	}
 
+	ret = phy_power_on(pcie->phy);
+	if (ret) {
+		dev_err(pcie->dev, "unable to power on PCIe PHY\n");
+		goto err_exit_phy;
 	}
 
 	iproc_pcie_reset(pcie);

@@ -239,12 +236,9 @@ err_rm_root_bus:
 	pci_remove_root_bus(bus);
 
 err_power_off_phy:
-	if (pcie->phy)
-		phy_power_off(pcie->phy);
+	phy_power_off(pcie->phy);
 err_exit_phy:
-	if (pcie->phy)
-		phy_exit(pcie->phy);
-
+	phy_exit(pcie->phy);
 	return ret;
 }
 EXPORT_SYMBOL(iproc_pcie_setup);

@@ -254,10 +248,8 @@ int iproc_pcie_remove(struct iproc_pcie *pcie)
 	pci_stop_root_bus(pcie->root_bus);
 	pci_remove_root_bus(pcie->root_bus);
 
-	if (pcie->phy) {
-		phy_power_off(pcie->phy);
-		phy_exit(pcie->phy);
-	}
+	phy_power_off(pcie->phy);
+	phy_exit(pcie->phy);
 
 	return 0;
 }