linux-kernel - [PATCH] serial: fix Kconfig for Freescale 16550

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Date:	Tue, 13 Dec 2011 11:31:03 +1100
From:	Michael Neuling <mikey@...ling.org>
To:	Paul Gortmaker <paul.gortmaker@...driver.com>
cc:	Alan Cox <alan@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	linux-kernel@...r.kernel.org, sfr@...b.auug.org.au,
	linux-next@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Michal Marek <mmarek@...e.cz>
Subject: [PATCH] serial: fix Kconfig for Freescale 16550

next-20111212 breaks with linking a pmac32_defconfig with:
  drivers/built-in.o: In function `fsl8250_handle_irq':
  (.text+0x7ba74): undefined reference to `serial8250_modem_status'
  drivers/built-in.o: In function `fsl8250_handle_irq':
  (.text+0x7baa4): undefined reference to `serial8250_tx_chars'
  drivers/built-in.o: In function `fsl8250_handle_irq':
  (.text+0x7bab4): undefined reference to `serial8250_rx_chars'

Caused by:
  9deaa53 serial: add irq handler for Freescale 16550 errata.

pmac32_defconfig results in SERIAL_8250_FSL=y but SERIAL_8250=m so
8250_fsl.c doesn't link properly.  

This explicitly makes SERIAL_8250_FSL depends on SERIAL_8250=y. 

Signed-off-by: Michael Neuling <mikey@...ling.org>
---
I'm not sure this is the right fix as it seems like a Kconfig bug.  

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index a1d55c3..c9046de 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -99,7 +99,7 @@ config SERIAL_8250_PNP
 
 config SERIAL_8250_FSL
 	bool
-	depends on SERIAL_8250 && PPC
+	depends on SERIAL_8250=y && PPC
 	default PPC
 
 config SERIAL_8250_HP300
--
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