Date: Wed, 31 Aug 2005 14:18:12 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: jhb@freebsd.org Cc: freebsd-smp@freebsd.org, markir@paradise.net.nz Subject: Re: 6.0 BETA3 reboot hangs on SMP system if BIOS USB disabled Message-ID: <20050831.141812.45157237.imp@bsdimp.com> In-Reply-To: <200508311556.19878.jhb@FreeBSD.org> References: <200508301623.57973.jhb@FreeBSD.org> <20050830.150750.91757991.imp@bsdimp.com> <200508311556.19878.jhb@FreeBSD.org>
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In message: <200508311556.19878.jhb@FreeBSD.org>
John Baldwin <jhb@FreeBSD.org> writes:
: Yes, that's ok.
OK. I think that the following is sufficient. Please test and let me
know.
Index: pci.c
===================================================================
RCS file: /cache/ncvs/src/sys/dev/pci/pci.c,v
retrieving revision 1.292
diff -u -r1.292 pci.c
--- pci.c 3 Jun 2005 19:41:06 -0000 1.292
+++ pci.c 31 Aug 2005 20:12:36 -0000
@@ -826,9 +826,14 @@
* If base is 0, then we have problems. It is best to ignore
* such entries for the moment. These will be allocated later if
* the driver specifically requests them.
+ *
+ * Similarlly treat maps whose values is the same as the test value
+ * read back. These maps have had all f's written to them by the
+ * BIOS in an attempt to disable the resources.
*/
- if (base == 0)
+ if (base == 0 || map == testval)
return 1;
+
/*
* This code theoretically does the right thing, but has
* undesirable side effects in some cases where peripherals
Warner
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