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genirq: Allow the PM device to originate from irq domain

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[ Upstream commit 1f8863bfb5ca500ea1c7669b16b1931ba27fce20 ]

As a preparation to moving the reference to the device used for
runtime power management, add a new 'dev' field to the irqdomain
structure for that exact purpose.

The irq_chip_pm_{get,put}() helpers are made aware of the dual
location via a new private helper.

No functional change intended.

Signed-off-by: Marc Zyngier <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Tested-by: Geert Uytterhoeven <[email protected]>
Tested-by: Tony Lindgren <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Stable-dep-of: 33b1c47d1fc0 ("irqchip/imx-irqsteer: Handle runtime power management correctly")
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Marc Zyngier 2022-02-01 12:02:59 +00:00 • committed by Greg Kroah-Hartman
commit 9951e76f39
2 changed files with 28 additions and 5 deletions
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23
kernel/irq/chip.c
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@ -1528,6 +1528,17 @@ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
return 0;
}
static struct device *irq_get_parent_device(struct irq_data *data)
{
if (data->chip->parent_device)
return data->chip->parent_device;
if (data->domain)
return data->domain->dev;
return NULL;
}
/**
* irq_chip_pm_get - Enable power for an IRQ chip
* @data: Pointer to interrupt specific data
@ -1537,12 +1548,13 @@ int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
*/
int irq_chip_pm_get(struct irq_data *data)
{
struct device *dev = irq_get_parent_device(data);
int retval;
if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) {
retval = pm_runtime_get_sync(data->chip->parent_device);
if (IS_ENABLED(CONFIG_PM) && dev) {
retval = pm_runtime_get_sync(dev);
if (retval < 0) {
pm_runtime_put_noidle(data->chip->parent_device);
pm_runtime_put_noidle(dev);
return retval;
}
}
@ -1560,10 +1572,11 @@ int irq_chip_pm_get(struct irq_data *data)
*/
int irq_chip_pm_put(struct irq_data *data)
{
struct device *dev = irq_get_parent_device(data);
int retval = 0;
if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)
retval = pm_runtime_put(data->chip->parent_device);
if (IS_ENABLED(CONFIG_PM) && dev)
retval = pm_runtime_put(dev);
return (retval < 0) ? retval : 0;
}