Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Tue, 14 Dec 2021 17:11:31 +0100 | From | Mikhail Golubev <> | Subject | [PATCH v2] virtio_mmio: pm: Add notification handlers for restore and freeze |
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From: Yurii Danilovskyi <glyd@opensynergy.com>
Handle restore and freeze notifications from the PM core. Expose these to individual virtio drivers that can quiesce and resume vq operations.
Signed-off-by: Yurii Danilovskyi <glyd@opensynergy.com> Signed-off-by: Mikhail Golubev <Mikhail.Golubev@opensynergy.com> --- v2: fix build for defconfigs with CONFIG_PM/CONFIG_PM_SLEEP disabled
drivers/virtio/virtio_mmio.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 56128b9c46eb..d5a2e8d2f31d 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -762,6 +762,26 @@ static void vm_unregister_cmdline_devices(void) #endif +#ifdef CONFIG_PM_SLEEP +static int virtio_mmio_freeze(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct virtio_mmio_device *vm_dev = platform_get_drvdata(pdev); + + return virtio_device_freeze(&vm_dev->vdev); +} + +static int virtio_mmio_restore(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct virtio_mmio_device *vm_dev = platform_get_drvdata(pdev); + + return virtio_device_restore(&vm_dev->vdev); +} +#endif + +static SIMPLE_DEV_PM_OPS(virtio_mmio_pm_ops, virtio_mmio_freeze, virtio_mmio_restore); + /* Platform driver */ static const struct of_device_id virtio_mmio_match[] = { @@ -785,6 +805,7 @@ static struct platform_driver virtio_mmio_driver = { .name = "virtio-mmio", .of_match_table = virtio_mmio_match, .acpi_match_table = ACPI_PTR(virtio_mmio_acpi_match), + .pm = &virtio_mmio_pm_ops, }, }; -- 2.34.1
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