request_irq() is preferred over setup_irq(). The early boot setup_irq() invocations happen either via 'init_IRQ()' or 'time_init()', while memory allocators are ready by 'mm_init()'. 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(). Seldom remove_irq() usage has been observed coupled with setup_irq(), wherever that has been found, it too has been replaced by free_irq(). [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed <afzal.mohd.ma@xxxxxxxxx> --- v2: * Replace pr_err("request_irq() on %s failed" by pr_err("%s: request_irq() failed" * Commit message massage arch/parisc/kernel/irq.c | 21 +++++---------------- drivers/parisc/eisa.c | 8 ++------ 2 files changed, 7 insertions(+), 22 deletions(-) diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c index e5fcfb70cc7c..cb48523e7d19 100644 --- a/arch/parisc/kernel/irq.c +++ b/arch/parisc/kernel/irq.c @@ -560,20 +560,6 @@ void do_cpu_irq_mask(struct pt_regs *regs) goto out; } -static struct irqaction timer_action = { - .handler = timer_interrupt, - .name = "timer", - .flags = IRQF_TIMER | IRQF_PERCPU | IRQF_IRQPOLL, -}; - -#ifdef CONFIG_SMP -static struct irqaction ipi_action = { - .handler = ipi_interrupt, - .name = "IPI", - .flags = IRQF_PERCPU, -}; -#endif - static void claim_cpu_irqs(void) { int i; @@ -583,10 +569,13 @@ static void claim_cpu_irqs(void) } irq_set_handler(TIMER_IRQ, handle_percpu_irq); - setup_irq(TIMER_IRQ, &timer_action); + if (request_irq(TIMER_IRQ, timer_interrupt, + IRQF_TIMER | IRQF_PERCPU | IRQF_IRQPOLL, "timer", NULL)) + pr_err("%s: request_irq() failed\n", "timer"); #ifdef CONFIG_SMP irq_set_handler(IPI_IRQ, handle_percpu_irq); - setup_irq(IPI_IRQ, &ipi_action); + if (request_irq(IPI_IRQ, ipi_interrupt, IRQF_PERCPU, "IPI", NULL)) + pr_err("%s: request_irq() failed\n", "IPI"); #endif } diff --git a/drivers/parisc/eisa.c b/drivers/parisc/eisa.c index 9d00a24277aa..213d21f228e7 100644 --- a/drivers/parisc/eisa.c +++ b/drivers/parisc/eisa.c @@ -243,11 +243,6 @@ static irqreturn_t dummy_irq2_handler(int _, void *dev) return IRQ_HANDLED; } -static struct irqaction irq2_action = { - .handler = dummy_irq2_handler, - .name = "cascade", -}; - static void init_eisa_pic(void) { unsigned long flags; @@ -335,7 +330,8 @@ static int __init eisa_probe(struct parisc_device *dev) } /* Reserve IRQ2 */ - setup_irq(2, &irq2_action); + if (request_irq(2, dummy_irq2_handler, 0, "cascade", NULL)) + pr_err("%s: request_irq() failed\n", "cascade"); for (i = 0; i < 16; i++) { irq_set_chip_and_handler(i, &eisa_interrupt_type, handle_simple_irq); -- 2.25.1
