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x86, pat: In rbt_memtype_check_insert(), update new->type only if valid 

new->type should only change when there is a valid ret_type. Otherwise
the requested type and return type should be same.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20100224214355.GA16431@linux-os.sc.intel.com>
Tested-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
hifive-unleashed-5.1
Pallipadi, Venkatesh 2010-02-24 13:43:55 -08:00 committed by H. Peter Anvin
parent 9e41a49aab
commit 4daa2a8093
1 changed files with 3 additions and 1 deletions
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4
arch/x86/mm/pat_rbtree.c
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@ -223,7 +223,9 @@ int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type)
new->type, ret_type);
if (!err) {
new->type = *ret_type;
if (ret_type)
new->type = *ret_type;
memtype_rb_insert(&memtype_rbroot, new);
}
return err;