diff options
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/uic.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/uic.c b/arch/powerpc/sysdev/uic.c index 22c219e448d..47180b3fca5 100644 --- a/arch/powerpc/sysdev/uic.c +++ b/arch/powerpc/sysdev/uic.c @@ -266,6 +266,9 @@ irqreturn_t uic_cascade(int virq, void *data) int subvirq; msr = mfdcr(uic->dcrbase + UIC_MSR); + if (!msr) /* spurious interrupt */ + return IRQ_HANDLED; + src = 32 - ffs(msr); subvirq = irq_linear_revmap(uic->irqhost, src); |