powerpc/xive: Fix IPI reset

When resetting an IPI, hw_ipi should also be set to zero. Fixes: eac1e73 ("powerpc/xive: guest exploitation of the XIVE interrupt controller") Signed-off-by: Cédric Le Goater <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
mrcsosa · Oct 4, 2017 · 74f1282 · 74f1282
1 parent 070e004
commit 74f1282
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c
@@ -431,7 +431,11 @@ static int xive_spapr_get_ipi(unsigned int cpu, struct xive_cpu *xc)
 
 static void xive_spapr_put_ipi(unsigned int cpu, struct xive_cpu *xc)
 {
+	if (!xc->hw_ipi)
+		return;
+
 	xive_irq_bitmap_free(xc->hw_ipi);
+	xc->hw_ipi = 0;
 }
 #endif /* CONFIG_SMP */