diff options
author | Kevin Hilman <khilman@linaro.org> | 2015-08-14 10:33:21 -0700 |
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committer | Kevin Hilman <khilman@linaro.org> | 2015-08-14 10:33:21 -0700 |
commit | 59255ac55ba6ecd195ef97c6bcd1303a7f838c94 (patch) | |
tree | c21899d772e8b55b74c9943f48ae88d3bd8724c9 /kernel/irq/resend.c | |
parent | 9106e24eb8e4dbe7f8de197317e68624ada540b0 (diff) | |
parent | 07818b5b1ba0f494a7255ab634bad2dd2b908ed0 (diff) |
Merge branch 'linux-linaro-lsk-v3.10' into linux-linaro-lsk-v3.10-rtlsk-v3.10-15.08-rt
Diffstat (limited to 'kernel/irq/resend.c')
-rw-r--r-- | kernel/irq/resend.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 9065107f083e..7a5237a1bce5 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -75,13 +75,21 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq) !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) { #ifdef CONFIG_HARDIRQS_SW_RESEND /* - * 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); |