irqchip/mips-gic: Fix IRQs in gic_dev_domain
When allocating a new device IRQ, gic_dev_domain_alloc() correctly calls
irq_domain_set_hwirq_and_chip(), but gic_irq_domain_alloc() does not. This
means that gic_irq_domain believes all IRQs from the dev domain have an
hwirq of 0 and creates incorrect mappings in the linear_revmap. As
gic_irq_domain is a parent of the gic_dev_domain, this leads to an
inability to boot on devices with a GIC. Excerpt of the error:
[ 2.297649] irq 0: nobody cared (try booting with the "irqpoll" option)
...
[ 2.436963] handlers:
[ 2.439492] Disabling IRQ #0
Fix this by calling irq_domain_set_hwirq_and_chip() for both the dev and
irq domain.
Now that we are modifying the parent domain, be sure to clear it up in
case of an allocation error.
Fixes: c98c1822ee13 ("irqchip/mips-gic: Add device hierarchy domain")
Fixes: 2af70a962070 ("irqchip/mips-gic: Add a IPI hierarchy domain")
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Tested-by: Govindraj Raja <Govindraj.Raja@imgtec.com> # On Pistachio SoC
Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Qais Yousef <qsyousef@gmail.com>
Cc: jason@lakedaemon.net
Cc: marc.zyngier@arm.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1464001552-31174-1-git-send-email-harvey.hunt@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 3b5e10a..8a4adbeb 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -746,6 +746,12 @@
/* verify that it doesn't conflict with an IPI irq */
if (test_bit(spec->hwirq, ipi_resrv))
return -EBUSY;
+
+ hwirq = GIC_SHARED_TO_HWIRQ(spec->hwirq);
+
+ return irq_domain_set_hwirq_and_chip(d, virq, hwirq,
+ &gic_level_irq_controller,
+ NULL);
} else {
base_hwirq = find_first_bit(ipi_resrv, gic_shared_intrs);
if (base_hwirq == gic_shared_intrs) {
@@ -867,10 +873,14 @@
&gic_level_irq_controller,
NULL);
if (ret)
- return ret;
+ goto error;
}
return 0;
+
+error:
+ irq_domain_free_irqs_parent(d, virq, nr_irqs);
+ return ret;
}
void gic_dev_domain_free(struct irq_domain *d, unsigned int virq,