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From: James Cleverdon <jamesclv@us.ibm.com>
Reply-To: jamesclv@us.ibm.com
Organization: IBM xSeries Linux Solutions
To: "Martin J. Bligh" <mbligh@aracnet.com>, linux-kernel@vger.kernel.org
Subject: [PATCH][2.5] static MAX_MP_BUSSES increase for Summit boxes
Date: Fri, 23 May 2003 20:27:26 -0700
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The dynamic MAX_MP_BUSSES fix for v2.4 never made it into 2.5.  x440s with 
RXE100s and 32-way x445s without can easily overflow it.

Here's a static patch:


diff -pru 2.5.69/include/asm-i386/mpspec.h t69/include/asm-i386/mpspec.h
--- 2.5.69/include/asm-i386/mpspec.h	Sun May  4 16:52:48 2003
+++ t69/include/asm-i386/mpspec.h	Fri May 23 20:17:59 2003
@@ -191,7 +191,13 @@ struct mpc_config_translation
 #define MAX_IRQ_SOURCES 256
 #endif /* CONFIG_X86_NUMAQ */
 
+#ifdef CONFIG_X86_SUMMIT
+/* BIOS reserves an amazing number of PCI busses on x440s and x445s,
+ * especially when RXE100s are attached. */
+#define MAX_MP_BUSSES 258
+#else
 #define MAX_MP_BUSSES 32
+#endif
 enum mp_bustype {
 	MP_BUS_ISA = 1,
 	MP_BUS_EISA,


-- 
James Cleverdon
IBM xSeries Linux Solutions
{jamesclv(Unix, preferred), cleverdj(Notes)} at us dot ibm dot com

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