From patchwork Tue Nov 24 01:43:03 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: MIPS: IP22/IP28 Disable EARLY_PRINTK on make the system boot Date: Tue, 24 Nov 2009 00:43:03 -0000 From: Ralf Baechle X-Patchwork-Id: 702 Message-Id: <20091124014303.GB3991@linux-mips.org> To: Martin Michlmayr , linux-mips@linux-mips.org, Thomas Bogendoerfer , Dmitri Vorobiev From: Martin Michlmayr 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 Cc: Martin Michlmayr Cc: linux-mips@linux-mips.org Cc: Thomas Bogendoerfer Cc: Dmitri Vorobiev Signed-off-by: Ralf Baechle --- 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