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https://github.com/torvalds/linux
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bd0b9ac405
Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/*
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* linux/kernel/irq/resend.c
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*
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* Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
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* Copyright (C) 2005-2006, Thomas Gleixner
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*
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* This file contains the IRQ-resend code
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*
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* If the interrupt is waiting to be processed, we try to re-run it.
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* We can't directly run it from here since the caller might be in an
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* interrupt-protected region. Not all irq controller chips can
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* retrigger interrupts at the hardware level, so in those cases
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* we allow the resending of IRQs via a tasklet.
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*/
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/random.h>
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#include <linux/interrupt.h>
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#include "internals.h"
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#ifdef CONFIG_HARDIRQS_SW_RESEND
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/* Bitmap to handle software resend of interrupts: */
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static DECLARE_BITMAP(irqs_resend, IRQ_BITMAP_BITS);
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/*
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* Run software resends of IRQ's
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*/
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static void resend_irqs(unsigned long arg)
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{
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struct irq_desc *desc;
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int irq;
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while (!bitmap_empty(irqs_resend, nr_irqs)) {
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irq = find_first_bit(irqs_resend, nr_irqs);
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clear_bit(irq, irqs_resend);
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desc = irq_to_desc(irq);
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local_irq_disable();
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desc->handle_irq(desc);
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local_irq_enable();
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}
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}
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/* Tasklet to handle resend: */
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static DECLARE_TASKLET(resend_tasklet, resend_irqs, 0);
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#endif
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/*
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* IRQ resend
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*
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* Is called with interrupts disabled and desc->lock held.
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*/
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void check_irq_resend(struct irq_desc *desc)
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{
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/*
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* We do not resend level type interrupts. Level type
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* interrupts are resent by hardware when they are still
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* active. Clear the pending bit so suspend/resume does not
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* get confused.
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*/
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if (irq_settings_is_level(desc)) {
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desc->istate &= ~IRQS_PENDING;
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return;
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}
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if (desc->istate & IRQS_REPLAY)
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return;
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if (desc->istate & IRQS_PENDING) {
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desc->istate &= ~IRQS_PENDING;
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desc->istate |= IRQS_REPLAY;
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if (!desc->irq_data.chip->irq_retrigger ||
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!desc->irq_data.chip->irq_retrigger(&desc->irq_data)) {
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#ifdef CONFIG_HARDIRQS_SW_RESEND
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unsigned int irq = irq_desc_get_irq(desc);
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/*
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* If the interrupt is running in the thread
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* context of the parent irq we need to be
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* careful, because we cannot trigger it
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* directly.
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*/
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if (irq_settings_is_nested_thread(desc)) {
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/*
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* If the parent_irq is valid, we
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* retrigger the parent, otherwise we
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* do nothing.
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*/
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if (!desc->parent_irq)
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return;
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irq = desc->parent_irq;
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}
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/* Set it pending and activate the softirq: */
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set_bit(irq, irqs_resend);
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tasklet_schedule(&resend_tasklet);
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#endif
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}
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}
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}
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