linux-kernel - [RFC v2 3/6] crypto: qat - address recursive dependency when fw signing is enabled

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Message-Id: <1431541436-17007-4-git-send-email-mcgrof@do-not-panic.com>
Date:	Wed, 13 May 2015 11:23:53 -0700
From:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
To:	ming.lei@...onical.com, rusty@...tcorp.com.au
Cc:	torvalds@...ux-foundation.org, dhowells@...hat.com,
	seth.forshee@...onical.com, linux-kernel@...r.kernel.org,
	pebolle@...cali.nl, linux-wireless@...r.kernel.org,
	gregkh@...uxfoundation.org, jlee@...e.com, tiwai@...e.de,
	casey@...aufler-ca.com, keescook@...omium.org, mjg59@...f.ucam.org,
	akpm@...ux-foundation.org, "Luis R. Rodriguez" <mcgrof@...e.com>,
	Kyle McMartin <kyle@...nel.org>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Tadeusz Struk <tadeusz.struk@...el.com>,
	John Griffin <john.griffin@...el.com>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [RFC v2 3/6] crypto: qat - address recursive dependency when fw signing is enabled

From: "Luis R. Rodriguez" <mcgrof@...e.com>

We're going to add firmware module signing support, but when we do
this we end up with the following recursive dependency. Fix this by
just depending on FW_LOADER, which is typically always enabled
anyway. We do this as a compromise for now as FW_LOADER is only
selectable when EXPERT is enabled and the recursive dependency issue
below is actually real and valid, its proper fix however requires
a bit of work.

This technically means this change is likely welcomed for other
parts of the kernel but this is really only needed for now here.

mcgrof@...on ~/linux-next (git::master)$ make allnoconfig
scripts/kconfig/conf  --allnoconfig Kconfig
crypto/Kconfig:15:error: recursive dependency detected!
crypto/Kconfig:15:      symbol CRYPTO is selected by SYSDATA_SIG
init/Kconfig:1880:      symbol SYSDATA_SIG is selected by FIRMWARE_SIG
drivers/base/Kconfig:88:        symbol FIRMWARE_SIG depends on FW_LOADER
drivers/base/Kconfig:80:        symbol FW_LOADER is selected by CRYPTO_DEV_QAT
drivers/crypto/qat/Kconfig:1:   symbol CRYPTO_DEV_QAT is selected by CRYPTO_DEV_QAT_DH895xCC
drivers/crypto/qat/Kconfig:13:  symbol CRYPTO_DEV_QAT_DH895xCC depends on CRYPTO

Cc: Paul Bolle <pebolle@...cali.nl>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: David Howells <dhowells@...hat.com>
Cc: Ming Lei <ming.lei@...onical.com>
Cc: Kyle McMartin <kyle@...nel.org>
Cc: Bruce Allan <bruce.w.allan@...el.com>
Cc: Tadeusz Struk <tadeusz.struk@...el.com>
Cc: John Griffin <john.griffin@...el.com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
---
 drivers/crypto/qat/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/qat/Kconfig b/drivers/crypto/qat/Kconfig
index 49bede2..9bea338 100644
--- a/drivers/crypto/qat/Kconfig
+++ b/drivers/crypto/qat/Kconfig
@@ -8,7 +8,7 @@ config CRYPTO_DEV_QAT
 	select CRYPTO_SHA1
 	select CRYPTO_SHA256
 	select CRYPTO_SHA512
-	select FW_LOADER
+	depends on FW_LOADER

 config CRYPTO_DEV_QAT_DH895xCC
 	tristate "Support for Intel(R) DH895xCC"
-- 
2.3.2.209.gd67f9d5.dirty

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