From: Ralf Baechle <ralf@linux-mips.org>
To: Martin Michlmayr <tbm@cyrius.com>,
linux-mips@linux-mips.org,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Subject: [PATCH] MIPS: IP22/IP28 Disable EARLY_PRINTK on make the system boot
Date: Tue, 24 Nov 2009 01:43:03 +0000 [thread overview]
Message-ID: <20091124014303.GB3991@linux-mips.org> (raw)
From: Martin Michlmayr <tbm@cyrius.com>
Some Debian users have reported that the kernel hangs early during boot on
some IP22 systems. Thomas Bogendoerfer found that this is due to a "bad
interaction between CONFIG_EARLY_PRINTK and overwritten prom memory during
early boot". Since there's no fix yet, disable CONFIG_EARLY_PRINTK for now.
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Cc: Martin Michlmayr <tbm@cyrius.com>
Cc: linux-mips@linux-mips.org
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
This version also disables early printk for IP28.
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 1aad0d9..ffdd651 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -358,7 +358,14 @@ config SGI_IP22
select SWAP_IO_SPACE
select SYS_HAS_CPU_R4X00
select SYS_HAS_CPU_R5000
- select SYS_HAS_EARLY_PRINTK
+ #
+ # Disable EARLY_PRINTK for now since it leads to overwritten prom
+ # memory during early boot on some machines.
+ #
+ # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
+ # for a more details discussion
+ #
+ # select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
@@ -410,7 +417,14 @@ config SGI_IP28
select SGI_HAS_ZILOG
select SWAP_IO_SPACE
select SYS_HAS_CPU_R10000
- select SYS_HAS_EARLY_PRINTK
+ #
+ # Disable EARLY_PRINTK for now since it leads to overwritten prom
+ # memory during early boot on some machines.
+ #
+ # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
+ # for a more details discussion
+ #
+ # select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
help
reply other threads:[~2009-11-24 1:42 UTC|newest]
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