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authorThomas Gleixner <tglx@linutronix.de>2015-07-30 00:13:24 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-07-30 00:13:24 +0200
commit4b979e4c611ce750d32b51737f837b485f43c69b (patch)
tree3bc56f2a22d2cf29bc183b67e74e1e8c0733efc0 /kernel/irq/resend.c
parent1559f3b8d0527e24219149c95b3de5e7b2924828 (diff)
parentcbfe8fa6cd672011c755c3cd85c9ffd4e2d10a6f (diff)
downloadlinux-4b979e4c611ce750d32b51737f837b485f43c69b.tar.bz2
Merge branch 'linus' into irq/core
Pull in upstream fixes before applying conflicting changes
Diffstat (limited to 'kernel/irq/resend.c')
-rw-r--r--kernel/irq/resend.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 32fc47c2c622..dd95f44f99b2 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -77,13 +77,21 @@ void check_irq_resend(struct irq_desc *desc)
unsigned int irq = irq_desc_get_irq(desc);
/*
- * If the interrupt has a parent irq and runs
- * in the thread context of the parent irq,
- * retrigger the parent.
+ * If the interrupt is running in the thread
+ * context of the parent irq we need to be
+ * careful, because we cannot trigger it
+ * directly.
*/
- if (desc->parent_irq &&
- irq_settings_is_nested_thread(desc))
+ if (irq_settings_is_nested_thread(desc)) {
+ /*
+ * If the parent_irq is valid, we
+ * retrigger the parent, otherwise we
+ * do nothing.
+ */
+ if (!desc->parent_irq)
+ return;
irq = desc->parent_irq;
+ }
/* Set it pending and activate the softirq: */
set_bit(irq, irqs_resend);
tasklet_schedule(&resend_tasklet);