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Commit 01e9651a authored by Magnus Damm's avatar Magnus Damm Committed by Paul Mundt
Browse files

sh: add INTC out of memory error handling 



Extend the INTC code to warn and return an error code
in the case of memory allocation failure.

Signed-off-by: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 39710479

drivers/sh/intc.c

+28 −1
Original line number Diff line number Diff line
@@ -789,13 +789,15 @@ static void intc_redirect_irq(unsigned int irq, struct irq_desc *desc) 
	generic_handle_irq((unsigned int)get_irq_data(irq));

}



void __init register_intc_controller(struct intc_desc *desc)

int __init register_intc_controller(struct intc_desc *desc)

{

	unsigned int i, k, smp;

	struct intc_hw_desc *hw = &desc->hw;

	struct intc_desc_int *d;



	d = kzalloc(sizeof(*d), GFP_NOWAIT);

	if (!d)

		goto err0;



	INIT_LIST_HEAD(&d->list);

	list_add(&d->list, &intc_list);
@@ -806,8 +808,13 @@ void __init register_intc_controller(struct intc_desc *desc) 
	d->nr_reg += hw->ack_regs ? hw->nr_ack_regs : 0;



	d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT);

	if (!d->reg)

		goto err1;



#ifdef CONFIG_SMP

	d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT);

	if (!d->smp)

		goto err2;

#endif

	k = 0;
@@ -822,6 +829,8 @@ void __init register_intc_controller(struct intc_desc *desc) 
	if (hw->prio_regs) {

		d->prio = kzalloc(hw->nr_vectors * sizeof(*d->prio),

				  GFP_NOWAIT);

		if (!d->prio)

			goto err3;



		for (i = 0; i < hw->nr_prio_regs; i++) {

			smp = IS_SMP(hw->prio_regs[i]);
@@ -833,6 +842,8 @@ void __init register_intc_controller(struct intc_desc *desc) 
	if (hw->sense_regs) {

		d->sense = kzalloc(hw->nr_vectors * sizeof(*d->sense),

				   GFP_NOWAIT);

		if (!d->sense)

			goto err4;



		for (i = 0; i < hw->nr_sense_regs; i++)

			k += save_reg(d, k, hw->sense_regs[i].reg, 0);
@@ -912,6 +923,22 @@ void __init register_intc_controller(struct intc_desc *desc) 
	/* enable bits matching force_enable after registering irqs */

	if (desc->force_enable)

		intc_enable_disable_enum(desc, d, desc->force_enable, 1);



	return 0;

 err4:

	kfree(d->prio);

 err3:

#ifdef CONFIG_SMP

	kfree(d->smp);

 err2:

#endif

	kfree(d->reg);

 err1:

	kfree(d);

 err0:

	pr_err("unable to allocate INTC memory\n");



	return -ENOMEM;

}



static int intc_suspend(struct sys_device *dev, pm_message_t state)

include/linux/sh_intc.h

+1 −1
Original line number Diff line number Diff line
@@ -92,7 +92,7 @@ struct intc_desc symbol __initdata = { \ 
			   prio_regs, sense_regs, ack_regs),		\

}



void __init register_intc_controller(struct intc_desc *desc);

int __init register_intc_controller(struct intc_desc *desc);

int intc_set_priority(unsigned int irq, unsigned int prio);



int reserve_irq_vector(unsigned int irq);