powerpc/xive: Fix IPI reset
authorCédric Le Goater <clg@kaod.org>
Wed, 4 Oct 2017 09:15:04 +0000 (11:15 +0200)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 4 Oct 2017 11:01:15 +0000 (22:01 +1100)
When resetting an IPI, hw_ipi should also be set to zero.

Fixes: eac1e731b59e ("powerpc/xive: guest exploitation of the XIVE interrupt controller")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/sysdev/xive/spapr.c

index f24a70bc6855d54cf86a50d17fefebc9777e2ed0..d9c4c93660491849029044d37ab8e60160b0d7de 100644 (file)
@@ -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 */