netdev - [PATCH net-next] net/mlxfw: Properly handle dependancy with non-loadable mlx5

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Date:   Sun,  2 Jul 2017 18:57:28 +0300
From:   Or Gerlitz <ogerlitz@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Saeed Mahameed <saeedm@...lanox.com>,
        mlxsw@...lanox.com, Or Gerlitz <ogerlitz@...lanox.com>
Subject: [PATCH net-next] net/mlxfw: Properly handle dependancy with non-loadable mlx5

If mlx5 is set to be built-in and mlxfw as a module, we
get a link error:

drivers/built-in.o: In function `mlx5_firmware_flash':
(.text+0x5aed72): undefined reference to `mlxfw_firmware_flash'

Since we don't want to mandate selecting mlxfw for mlx5 users, we
use the IS_REACHABLE macro to make sure that a stub is exposed
to the caller.

Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
Reported-by: Jakub Kicinski <kubakici@...pl>
Reported-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/ethernet/mellanox/mlxfw/mlxfw.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxfw/mlxfw.h b/drivers/net/ethernet/mellanox/mlxfw/mlxfw.h
index 9ca8538..7a712b6 100644
--- a/drivers/net/ethernet/mellanox/mlxfw/mlxfw.h
+++ b/drivers/net/ethernet/mellanox/mlxfw/mlxfw.h
@@ -96,7 +96,7 @@ struct mlxfw_dev {
 	u16 psid_size;
 };
 
-#if IS_ENABLED(CONFIG_MLXFW)
+#if IS_REACHABLE(CONFIG_MLXFW)
 int mlxfw_firmware_flash(struct mlxfw_dev *mlxfw_dev,
 			 const struct firmware *firmware);
 #else
-- 
2.3.7