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Message-Id: <1292003871-13979-1-git-send-email-mjg@redhat.com> Date: Fri, 10 Dec 2010 12:57:51 -0500 From: Matthew Garrett <mjg@...hat.com> To: x86@...nel.org Cc: hpa@...or.com, linux-acpi@...r.kernel.org, lenb@...nel.org, linux-kernel@...r.kernel.org, Matthew Garrett <mjg@...hat.com> Subject: [PATCH] ACPI: Make sure the FADT is at least rev 2 before using the reset register The reset register was only introduced with version 2 of the FADT, so we should check that the FADT revision before trusting its contents. Signed-off-by: Matthew Garrett <mjg@...hat.com> --- drivers/acpi/reboot.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c index 4870aaa..a6c77e8b 100644 --- a/drivers/acpi/reboot.c +++ b/drivers/acpi/reboot.c @@ -15,6 +15,11 @@ void acpi_reboot(void) rr = &acpi_gbl_FADT.reset_register; + /* ACPI reset register was only introduced with v2 of the FADT */ + + if (acpi_gbl_FADT.header.revision < 2) + return; + /* Is the reset register supported? The spec says we should be * checking the bit width and bit offset, but Windows ignores * these fields */ -- 1.7.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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