mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-27 14:14:24 +08:00
2167c40657
388c8c16ab ("PCI: add routines for debugging and handling lost
interrupts") added pci_lost_interrupt() that apparently never has had a
single user. Remove it.
Link: https://lore.kernel.org/r/e328d059-3068-6a40-28df-f81f616d15a0@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* PCI IRQ handling code
|
|
*
|
|
* Copyright (c) 2008 James Bottomley <James.Bottomley@HansenPartnership.com>
|
|
* Copyright (C) 2017 Christoph Hellwig.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/export.h>
|
|
#include <linux/pci.h>
|
|
|
|
/**
|
|
* pci_request_irq - allocate an interrupt line for a PCI device
|
|
* @dev: PCI device to operate on
|
|
* @nr: device-relative interrupt vector index (0-based).
|
|
* @handler: Function to be called when the IRQ occurs.
|
|
* Primary handler for threaded interrupts.
|
|
* If NULL and thread_fn != NULL the default primary handler is
|
|
* installed.
|
|
* @thread_fn: Function called from the IRQ handler thread
|
|
* If NULL, no IRQ thread is created
|
|
* @dev_id: Cookie passed back to the handler function
|
|
* @fmt: Printf-like format string naming the handler
|
|
*
|
|
* This call allocates interrupt resources and enables the interrupt line and
|
|
* IRQ handling. From the point this call is made @handler and @thread_fn may
|
|
* be invoked. All interrupts requested using this function might be shared.
|
|
*
|
|
* @dev_id must not be NULL and must be globally unique.
|
|
*/
|
|
int pci_request_irq(struct pci_dev *dev, unsigned int nr, irq_handler_t handler,
|
|
irq_handler_t thread_fn, void *dev_id, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
char *devname;
|
|
unsigned long irqflags = IRQF_SHARED;
|
|
|
|
if (!handler)
|
|
irqflags |= IRQF_ONESHOT;
|
|
|
|
va_start(ap, fmt);
|
|
devname = kvasprintf(GFP_KERNEL, fmt, ap);
|
|
va_end(ap);
|
|
|
|
ret = request_threaded_irq(pci_irq_vector(dev, nr), handler, thread_fn,
|
|
irqflags, devname, dev_id);
|
|
if (ret)
|
|
kfree(devname);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pci_request_irq);
|
|
|
|
/**
|
|
* pci_free_irq - free an interrupt allocated with pci_request_irq
|
|
* @dev: PCI device to operate on
|
|
* @nr: device-relative interrupt vector index (0-based).
|
|
* @dev_id: Device identity to free
|
|
*
|
|
* Remove an interrupt handler. The handler is removed and if the interrupt
|
|
* line is no longer in use by any driver it is disabled. The caller must
|
|
* ensure the interrupt is disabled on the device before calling this function.
|
|
* The function does not return until any executing interrupts for this IRQ
|
|
* have completed.
|
|
*
|
|
* This function must not be called from interrupt context.
|
|
*/
|
|
void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id)
|
|
{
|
|
kfree(free_irq(pci_irq_vector(dev, nr), dev_id));
|
|
}
|
|
EXPORT_SYMBOL(pci_free_irq);
|