linux/arch/mips/cobalt/irq.c
afzal mohammed ac8fd122e0 MIPS: Replace setup_irq() by request_irq()
request_irq() is preferred over setup_irq(). Invocations of setup_irq()
occur after memory allocators are ready.

Per tglx[1], setup_irq() existed in olden days when allocators were not
ready by the time early interrupts were initialized.

Hence replace setup_irq() by request_irq().

remove_irq() has been replaced by free_irq() as well.

There were build error's during previous version, couple of which was
reported by kbuild test robot <lkp@intel.com> of which one was reported
by Thomas Bogendoerfer <tsbogend@alpha.franken.de> as well. There were a
few more issues including build errors, those also have been fixed.

[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos

Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-03-05 16:47:35 +01:00

65 lines
1.5 KiB
C

/*
* IRQ vector handles
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <asm/i8259.h>
#include <asm/irq_cpu.h>
#include <asm/irq_gt641xx.h>
#include <asm/gt64120.h>
#include <irq.h>
asmlinkage void plat_irq_dispatch(void)
{
unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM;
int irq;
if (pending & CAUSEF_IP2)
gt641xx_irq_dispatch();
else if (pending & CAUSEF_IP6) {
irq = i8259_irq();
if (irq < 0)
spurious_interrupt();
else
do_IRQ(irq);
} else if (pending & CAUSEF_IP3)
do_IRQ(MIPS_CPU_IRQ_BASE + 3);
else if (pending & CAUSEF_IP4)
do_IRQ(MIPS_CPU_IRQ_BASE + 4);
else if (pending & CAUSEF_IP5)
do_IRQ(MIPS_CPU_IRQ_BASE + 5);
else if (pending & CAUSEF_IP7)
do_IRQ(MIPS_CPU_IRQ_BASE + 7);
else
spurious_interrupt();
}
void __init arch_init_irq(void)
{
mips_cpu_irq_init();
gt641xx_irq_init();
init_i8259_irqs();
if (request_irq(GT641XX_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
"cascade", NULL)) {
pr_err("Failed to request irq %d (cascade)\n",
GT641XX_CASCADE_IRQ);
}
if (request_irq(I8259_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
"cascade", NULL)) {
pr_err("Failed to request irq %d (cascade)\n",
I8259_CASCADE_IRQ);
}
}