Messages in this thread | | | Date | Sun, 1 Nov 2009 14:05:44 +0100 | Subject | threaded irq handler thread doesn't run | From | Manuel Lauss <> |
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Hello!
I noticed that the thread of a threaded irq doesn't run if the interrupt is disabled: I have a semi-broken system with 2 carddetect interrupts, both are supposed to be edge-triggered, but due to broken PLD they continue screaming as long as their trigger condition is met. To work around this, the triggering one is disabled while the other gets enabled; disabling occurs in the "fast" handler, enabling in the threaded handler:
static irqreturn_t threadfn(irq, ctx) { ... enable_irq(irq == cd1int ? cd2int : cd1int); ... }
static irqreturn_t fastint(irq, ctx) { disable_irq_nosync(irq); return IRQ_WAKE_THREAD; } ... request_threaded_irq(cd1int, fastint, threadfn, 0, "insert", ctx); request_threaded_irq(cd2int, fastint, threadfn, 0, "eject", ctx);
In kernel/irq/manage.c::irq_thread(), the thread func isn't run if the irq has been disabled; is there a way around this? (removing that restriction completely solves it for me, but I doubt this is acceptable for others).
Thanks! Manuel Lauss
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