linux-kernel - [patch] dvb: build failure fix

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Message-ID: <20080428162421.GA16566@elte.hu>
Date:	Mon, 28 Apr 2008 18:24:21 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [patch] dvb: build failure fix


fix build failure found via x86.git randconfig testing:

 drivers/built-in.o: In function `tda829x_attach':
 : undefined reference to `tda827x_attach'
 drivers/built-in.o: In function `tda829x_attach':
 : undefined reference to `tda18271_attach'

build failure is due to this nasty dependency:

  CONFIG_DVB_CORE=m but CONFIG_TUNER_TDA8290=y.

the solution is to follow the DVB_CORE constraint in the Kconfig. It's 
not pretty but works.

Kconfig should be enhanced instead with a new keyword: "depends on 
instructure ..." that makes it clear that the dependent module can only 
be of equal or lesser link mode - but not =y while the infrastructure 
module is =m. But i digress.

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 drivers/media/Kconfig |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Index: linux/drivers/media/Kconfig
===================================================================
--- linux.orig/drivers/media/Kconfig
+++ linux/drivers/media/Kconfig
@@ -106,21 +106,21 @@ if VIDEO_TUNER_CUSTOMIZE
 
 config TUNER_XC2028
 	tristate "XCeive xc2028/xc3028 tuners"
-	depends on I2C && FW_LOADER
+	depends on I2C && FW_LOADER && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	default m if VIDEO_TUNER_CUSTOMIZE
 	help
 	  Say Y here to include support for the xc2028/xc3028 tuners.
 
 config TUNER_MT20XX
 	tristate "Microtune 2032 / 2050 tuners"
-	depends on I2C
+	depends on I2C && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	default m if VIDEO_TUNER_CUSTOMIZE
 	help
 	  Say Y here to include support for the MT2032 / MT2050 tuner.
 
 config TUNER_TDA8290
 	tristate "TDA 8290/8295 + 8275(a)/18271 tuner combo"
-	depends on I2C
+	depends on I2C && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	select DVB_TDA827X
 	select DVB_TDA18271
 	default m if VIDEO_TUNER_CUSTOMIZE
@@ -129,21 +129,21 @@ config TUNER_TDA8290
 
 config TUNER_TEA5761
 	tristate "TEA 5761 radio tuner (EXPERIMENTAL)"
-	depends on I2C && EXPERIMENTAL
+	depends on I2C && EXPERIMENTAL && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	default m if VIDEO_TUNER_CUSTOMIZE
 	help
 	  Say Y here to include support for the Philips TEA5761 radio tuner.
 
 config TUNER_TEA5767
 	tristate "TEA 5767 radio tuner"
-	depends on I2C
+	depends on I2C && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	default m if VIDEO_TUNER_CUSTOMIZE
 	help
 	  Say Y here to include support for the Philips TEA5767 radio tuner.
 
 config TUNER_SIMPLE
 	tristate "Simple tuner support"
-	depends on I2C
+	depends on I2C && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	select TUNER_TDA9887
 	default m if VIDEO_TUNER_CUSTOMIZE
 	help
@@ -151,7 +151,7 @@ config TUNER_SIMPLE
 
 config TUNER_TDA9887
 	tristate "TDA 9885/6/7 analog IF demodulator"
-	depends on I2C
+	depends on I2C && ((DVB_CORE = m && m) || (DVB_CORE = y))
 	default m if VIDEO_TUNER_CUSTOMIZE
 	help
 	  Say Y here to include support for Philips TDA9885/6/7
--
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