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i386: mtrr crash fix

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Commit 3ebad5905609476a4ff1151a66b21d9794009961 ("[PATCH] x86: Save and
restore the fixed-range MTRRs of the BSP when suspending") added mtrr
operations without verifying that the CPU has MTRRs.  Crashes transmeta
CPUs.

Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux@horizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2007-07-01 12:06:48 -07:00 committed by Linus Torvalds
parent 5ebffd7c05
commit 84288ad89e
1 changed files with 2 additions and 1 deletions
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3
arch/i386/kernel/cpu/mtrr/generic.c
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@ -65,7 +65,8 @@ get_fixed_ranges(mtrr_type * frs)
void mtrr_save_fixed_ranges(void *info)
{
get_fixed_ranges(mtrr_state.fixed_ranges);
if (cpu_has_mtrr)
get_fixed_ranges(mtrr_state.fixed_ranges);
}
static void print_fixed(unsigned base, unsigned step, const mtrr_type*types)