Meet the case when the request_threaded_irq() with the same irq
is called twice continually, get the below mismatch info:
"IRQ handler type mismatch for IRQ 323"
Here give a right warning that like below:
"Trying to setup already-setup non-shared IRQ 323"
Signed-off-by: liu chuansheng <chuansheng....@intel.com>
---
kernel/irq/manage.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e49a288..6802ce1 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -999,6 +999,16 @@ __setup_irq(unsigned int irq, struct irq_desc *desc,
struct irqaction *new)
old_ptr = &desc->action;
old = *old_ptr;
if (old) {
+ /* Give warning when setup an irq which has been setup
+ * already.
+ */
+ if (!(old->flags & IRQF_SHARED)) {
+ ret = -EINVAL;
+ WARN(1, "Trying to setup already-setup non-shared IRQ
%d\n",
+ irq);
+ goto out_mask;
+ }
+
/*
* Can't share interrupts unless both agree to and are
* the same type (level, edge, polarity). So both flag
--
1.7.0.4
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