2e64d7b182
[ Upstream commit b13fecb1c3a603c4b8e99b306fecf4f668c11b32 ]
This converts all the existing DECLARE_TASKLET() (and ...DISABLED)
macros with DECLARE_TASKLET_OLD() in preparation for refactoring the
tasklet callback type. All existing DECLARE_TASKLET() users had a "0"
data argument, it has been removed here as well.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Stable-dep-of: 1fdeb8b9f29d ("wifi: iwl3945: Add missing check for create_singlethread_workqueue")
Signed-off-by: Sasha Levin <sashal@kernel.org>
[Tom: fix backport to 5.4.y]
AUTOSEL backport to 5.4.y of:
b13fecb1c3a6 ("treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()")
changed all locations of DECLARE_TASKLET with DECLARE_TASKLET_OLD,
except one, in arch/mips/lasat/pcivue_proc.c.
This is due to:
10760dde9be3 ("MIPS: Remove support for LASAT") preceeding
b13fecb1c3a6 ("treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()")
upstream and the former not being present in 5.4.y.
Fix this by changing DECLARE_TASKLET to DECLARE_TASKLET_OLD in
arch/mips/lasat/pcivue_proc.c.
Fixes: 5de7a4254eb2 ("treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()")
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Signed-off-by: Tom Saeger <tom.saeger@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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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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if (!desc)
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continue;
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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_OLD(resend_tasklet, resend_irqs);
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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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