KVM: PPC: e500: fix handling local_sid_lookup result

The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda <[email protected]>
Acked-by: Scott Wood <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>

diff --git a/arch/powerpc/kvm/e500.c b/arch/powerpc/kvm/e500.c
index b29ce752c7d69027b1b07d42b0d9dc6d0ce2cf82..32fdab57d604d02eb16886818b0631b6612e3e61 100644 (file)
--- a/arch/powerpc/kvm/e500.c
+++ b/arch/powerpc/kvm/e500.c
@@ -237,7 +237,8 @@ void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
                            struct kvm_book3e_206_tlb_entry *gtlbe)
 {
        struct vcpu_id_table *idt = vcpu_e500->idt;
-       unsigned int pr, tid, ts, pid;
+       unsigned int pr, tid, ts;
+       int pid;
        u32 val, eaddr;
        unsigned long flags;