netdev - [RFC 02/11] net: phy: Simplify MMD device list termination

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Message-Id: <20200522213059.1535892-3-jeremy.linton@arm.com>
Date:   Fri, 22 May 2020 16:30:50 -0500
From:   Jeremy Linton <jeremy.linton@....com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, andrew@...n.ch, f.fainelli@...il.com,
        hkallweit1@...il.com, linux@...linux.org.uk,
        madalin.bucur@....nxp.com, calvin.johnson@....nxp.com,
        linux-kernel@...r.kernel.org, Jeremy Linton <jeremy.linton@....com>
Subject: [RFC 02/11] net: phy: Simplify MMD device list termination

Since we are already checking for *devs == 0 after
the loop terminates, we can add a mostly F's check
as well. With that change we can simplify the return/break
sequence inside the loop.

Add a valid_phy_id() macro for this, since we will be using it
in a couple other places.

Signed-off-by: Jeremy Linton <jeremy.linton@....com>
---
 drivers/net/phy/phy_device.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 245899b58a7d..7746c07b97fe 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -695,6 +695,11 @@ static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
 	return 0;
 }
 
+static bool valid_phy_id(int val)
+{
+	return (val > 0 && ((val & 0x1fffffff) != 0x1fffffff));
+}
+
 /**
  * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
  * @bus: the target MII bus
@@ -732,18 +737,12 @@ static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
 			phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
 			if (phy_reg < 0)
 				return -EIO;
-			/* no device there, let's get out of here */
-			if ((*devs & 0x1fffffff) == 0x1fffffff) {
-				*phy_id = 0xffffffff;
-				return 0;
-			} else {
-				break;
-			}
+			break;
 		}
 	}
 
 	/* no reported devices */
-	if (*devs == 0) {
+	if (!valid_phy_id(*devs)) {
 		*phy_id = 0xffffffff;
 		return 0;
 	}
-- 
2.26.2