netdev - [PATCH net-next v2 2/4] net: bgmac: Fix return value check for fixed_phy

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Date: Thu, 17 Aug 2023 20:16:29 +0800
From: Ruan Jinjie <ruanjinjie@...wei.com>
To: <rafal@...ecki.pl>, <bcm-kernel-feedback-list@...adcom.com>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <opendmb@...il.com>, <florian.fainelli@...adcom.com>,
	<bryan.whitehead@...rochip.com>, <andrew@...n.ch>, <hkallweit1@...il.com>,
	<linux@...linux.org.uk>, <mdf@...nel.org>, <pgynther@...gle.com>,
	<Pavithra.Sathyanarayanan@...rochip.com>, <netdev@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH net-next v2 2/4] net: bgmac: Fix return value check for fixed_phy_register()

The fixed_phy_register() function returns error pointers and never
returns NULL. Update the checks accordingly.

And it also returns -EPROBE_DEFER, -EINVAL and -EBUSY, etc, in addition to
-ENODEV, just return -ENODEV is not sensible, use
PTR_ERR to fix the issue.

Fixes: c25b23b8a387 ("bgmac: register fixed PHY for ARM BCM470X / BCM5301X chipsets")
Signed-off-by: Ruan Jinjie <ruanjinjie@...wei.com>
---
v2:
- Remove redundant NULL check and fix the return value.
- Update the commit title and message.
- Add the fix tag.
---
 drivers/net/ethernet/broadcom/bgmac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 10c7c232cc4e..448a1b90de5e 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1448,9 +1448,9 @@ int bgmac_phy_connect_direct(struct bgmac *bgmac)
 	int err;
 
 	phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
-	if (!phy_dev || IS_ERR(phy_dev)) {
+	if (IS_ERR(phy_dev)) {
 		dev_err(bgmac->dev, "Failed to register fixed PHY device\n");
-		return -ENODEV;
+		return PTR_ERR(phy_dev);
 	}
 
 	err = phy_connect_direct(bgmac->net_dev, phy_dev, bgmac_adjust_link,
-- 
2.34.1