From: jermar@itbs.cz
To: len.brown@intel.com
Cc: torvalds@osdl.org, aul.s.diefenbaugh@intel.com,
jun.nakajima@intel.com, linux-kernel@vger.kernel.org
Subject: PATCH: acpi_find_rsdp() diverges from ACPI specification
Date: Fri, 29 Apr 2005 23:03:50 +0200 [thread overview]
Message-ID: <20050429230350.qid9o7yht3qckkg8@mail.hosting123.cz> (raw)
Hello,
I found out that acpi_find_rsdp() tries to find the RSDP structure in an area
bit larger than the ACPI specification wants. The right interval should start
at 0xe0000 and end at 0xfffff. The search area is thus 128K+1B large.
Given the semantics of acpi_scan_rsdp(), the second argument should therefore be
the size, not the end address.
Should there be any comments, please email me directly as I don't regularily
read LKM.
Please, apply.
Jakub
--- linux-2.6.11.7/arch/i386/kernel/acpi/boot.c 2005-04-07 20:58:17.000000000
+0200
+++ linux-2.6.11.7-acpi-patch/arch/i386/kernel/acpi/boot.c 2005-04-29
21:39:08.000000000 +0200
@@ -644,7 +644,7 @@ acpi_find_rsdp (void)
*/
rsdp_phys = acpi_scan_rsdp (0, 0x400);
if (!rsdp_phys)
- rsdp_phys = acpi_scan_rsdp (0xE0000, 0xFFFFF);
+ rsdp_phys = acpi_scan_rsdp (0xE0000, 128*1024 + 1);
return rsdp_phys;
}
Signed-off-by: Jakub Jermar <jermar@itbs.cz>
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next reply other threads:[~2005-04-29 21:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-29 21:03 jermar [this message]
2005-04-29 21:43 ` Randy.Dunlap
2005-05-06 22:21 ` Jakub Jermar
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