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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-07-20 13:33:19 +0400
committerGrant Likely <grant.likely@secretlab.ca>2012-07-25 08:37:30 +0400
commitf5a1ad057e6da5d0fc9c5677ff44797d193d3e62 (patch)
tree41eba9c89a1792d07db9110177fe62187a717f4e /kernel/irq
parent4c0946c47463defa681b83294383dc996d255bb7 (diff)
downloadlinux-f5a1ad057e6da5d0fc9c5677ff44797d193d3e62.tar.xz
irqdomain: Improve diagnostics when a domain mapping fails
When the map operation fails log the error code we get and add a WARN_ON() so we get a backtrace (which should help work out which interrupt is the source of the issue). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/irqdomain.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 170724a07a2c..49a77727db42 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -415,7 +415,7 @@ int irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
{
unsigned int virq = irq_base;
irq_hw_number_t hwirq = hwirq_base;
- int i;
+ int i, ret;
pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
of_node_full_name(domain->of_node), irq_base, (int)hwirq_base, count);
@@ -436,11 +436,16 @@ int irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
irq_data->hwirq = hwirq;
irq_data->domain = domain;
- if (domain->ops->map && domain->ops->map(domain, virq, hwirq)) {
- pr_err("irq-%i==>hwirq-0x%lx mapping failed\n", virq, hwirq);
- irq_data->domain = NULL;
- irq_data->hwirq = 0;
- goto err_unmap;
+ if (domain->ops->map) {
+ ret = domain->ops->map(domain, virq, hwirq);
+ if (ret != 0) {
+ pr_err("irq-%i==>hwirq-0x%lx mapping failed: %d\n",
+ virq, hwirq, ret);
+ WARN_ON(1);
+ irq_data->domain = NULL;
+ irq_data->hwirq = 0;
+ goto err_unmap;
+ }
}
switch (domain->revmap_type) {