linux-kernel - [PATCH] macsec: fix crypto Kconfig dependency

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Message-Id: <1460884918-2879720-1-git-send-email-arnd@arndb.de>
Date:	Sun, 17 Apr 2016 11:19:55 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"David S. Miller" <davem@...emloft.net>,
	Sabrina Dubroca <sd@...asysnail.net>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Johannes Berg <johannes@...solutions.net>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] macsec: fix crypto Kconfig dependency

The new MACsec driver uses the AES crypto algorithm, but can be configured
even if CONFIG_CRYPTO is disabled, leading to a build error:

warning: (MAC80211 && MACSEC) selects CRYPTO_GCM which has unmet direct dependencies (CRYPTO)
warning: (BT && CEPH_LIB && INET && MAC802154 && MAC80211 && BLK_DEV_RBD && MACSEC && AIRO_CS && LIBIPW && HOSTAP && USB_WUSB && RTLLIB_CRYPTO_CCMP && FS_ENCRYPTION && EXT4_ENCRYPTION && CEPH_FS && BIG_KEYS && ENCRYPTED_KEYS) selects CRYPTO_AES which has unmet direct dependencies (CRYPTO)
crypto/built-in.o: In function `gcm_enc_copy_hash':
aes_generic.c:(.text+0x2b8): undefined reference to `crypto_xor'
aes_generic.c:(.text+0x2dc): undefined reference to `scatterwalk_map_and_copy'

This adds an explicit 'select CRYPTO' statement the way that other
drivers handle it.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
---
 drivers/net/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 2a1ba62b7da2..a24c18eee598 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -195,6 +195,7 @@ config GENEVE
 
 config MACSEC
 	tristate "IEEE 802.1AE MAC-level encryption (MACsec)"
+	select CRYPTO
 	select CRYPTO_AES
 	select CRYPTO_GCM
 	---help---
-- 
2.7.0