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Commit 2cb62547 authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
Browse files

genirq: Add IRQ_SET_MASK_OK_DONE to support stacked irqchip 



Add IRQ_SET_MASK_OK_DONE in addition to IRQ_SET_MASK_OK and
IRQ_SET_MASK_OK_NOCOPY to support stacked irqchip. IRQ_SET_MASK_OK_DONE
is the same as IRQ_SET_MASK_OK to irq core. To stacked irqchip, it means
that ascendant irqchips have done all the work and no more handling
needed in descendant irqchips.

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 515085ef

include/linux/irq.h

+4 −0
Original line number Diff line number Diff line
@@ -114,10 +114,14 @@ enum { 
 *

 * IRQ_SET_MASK_OK	- OK, core updates irq_data.affinity

 * IRQ_SET_MASK_NOCPY	- OK, chip did update irq_data.affinity

 * IRQ_SET_MASK_OK_DONE	- Same as IRQ_SET_MASK_OK for core. Special code to

 *			  support stacked irqchips, which indicates skipping

 *			  all descendent irqchips.

 */

enum {

	IRQ_SET_MASK_OK = 0,

	IRQ_SET_MASK_OK_NOCOPY,

	IRQ_SET_MASK_OK_DONE,

};



struct msi_desc;

kernel/irq/manage.c

+2 −0
Original line number Diff line number Diff line
@@ -183,6 +183,7 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask, 
	ret = chip->irq_set_affinity(data, mask, force);

	switch (ret) {

	case IRQ_SET_MASK_OK:

	case IRQ_SET_MASK_OK_DONE:

		cpumask_copy(data->affinity, mask);

	case IRQ_SET_MASK_OK_NOCOPY:

		irq_set_thread_affinity(desc);
@@ -600,6 +601,7 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, 


	switch (ret) {

	case IRQ_SET_MASK_OK:

	case IRQ_SET_MASK_OK_DONE:

		irqd_clear(&desc->irq_data, IRQD_TRIGGER_MASK);

		irqd_set(&desc->irq_data, flags);