Commit 95533614 authored by Milton Miller's avatar Milton Miller Committed by Benjamin Herrenschmidt
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powerpc/axon_msi: Validate msi irq via chip_data

Instead of checking for rogue msi numbers via the irq_map host field
set the chip_data to h.host_data (which is the msic struct pointer)
at map and compare it in get_irq.
Signed-off-by: default avatarMilton Miller <>
Signed-off-by: default avatarBenjamin Herrenschmidt <>
parent 6b0aea44
......@@ -113,7 +113,7 @@ static void axon_msi_cascade(unsigned int irq, struct irq_desc *desc)
pr_devel("axon_msi: woff %x roff %x msi %x\n",
write_offset, msic->read_offset, msi);
if (msi < NR_IRQS && virq_to_host(msi) == msic->irq_host) {
if (msi < NR_IRQS && irq_get_chip_data(msi) == msic) {
msic->fifo_virt[idx] = cpu_to_le32(0xffffffff);
} else {
......@@ -320,6 +320,7 @@ static struct irq_chip msic_irq_chip = {
static int msic_host_map(struct irq_host *h, unsigned int virq,
irq_hw_number_t hw)
irq_set_chip_data(virq, h->host_data);
irq_set_chip_and_handler(virq, &msic_irq_chip, handle_simple_irq);
return 0;
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