linux-kernel - [PATCH] net: phy: sfp: Do not use "imply HWMON"

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Date:   Thu, 19 Jul 2018 09:41:39 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH] net: phy: sfp: Do not use "imply HWMON"

"imply HWMON" was supposed to ensure that the SFP phy code can be built
with HWMON enabled or disabled while at the same time ensuring that
HWMON is not built as module if SFP is built into the kernel.
Unfortunately, that does not work as intended. With "allmodconfig", it
results in several unrelated HWMON drivers to be disabled instead of
being built as module as expected.

Let's use the old "depends on HWMON || HWMON=n" instead. This is slightly
different (it enforces SFP to be built as module if HWMON is built as
module), but it is better than the alternative of using "IS_REACHABLE()"
in the driver since that would disable sensor support if HWMON is built
as module and SFP is built into the kernel.

Fixes: 1323061a018a ("net: phy: sfp: Add HWMON support for module sensors")
Cc: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/net/phy/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index b7ff0af419b4..82070792edbb 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -214,8 +214,8 @@ comment "MII PHY device drivers"
 config SFP
 	tristate "SFP cage support"
 	depends on I2C && PHYLINK
+	depends on HWMON || HWMON=n
 	select MDIO_I2C
-	imply HWMON

 config AMD_PHY
 	tristate "AMD PHYs"
-- 
2.7.4