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um: virtio_uml: move device breaking into workqueue

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[ Upstream commit abdeb4fa5e ]

We should not be calling virtio_break_device from an IRQ context.
Move breaking the device into the workqueue so that it is done from
a reasonable context.

Fixes: af9fb41ed3 ("um: virtio_uml: Fix broken device handling in time-travel")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Benjamin Berg 2023-02-09 10:00:04 +01:00 • committed by Justin Hammond
parent 6315b4f200
commit 0e5457cbd1
1 changed files with 15 additions and 1 deletions
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16
arch/um/drivers/virtio_uml.c
View file

@ -170,7 +170,6 @@ static void vhost_user_check_reset(struct virtio_uml_device *vu_dev,
vu_dev->registered = 0;
virtio_break_device(&vu_dev->vdev);
schedule_work(&pdata->conn_broken_wk);
}
@ -1134,6 +1133,15 @@ void virtio_uml_set_no_vq_suspend(struct virtio_device *vdev,
static void vu_of_conn_broken(struct work_struct *wk)
{
struct virtio_uml_platform_data *pdata;
struct virtio_uml_device *vu_dev;
pdata = container_of(wk, struct virtio_uml_platform_data, conn_broken_wk);
vu_dev = platform_get_drvdata(pdata->pdev);
virtio_break_device(&vu_dev->vdev);
/*
* We can't remove the device from the devicetree so the only thing we
* can do is warn.
@ -1264,8 +1272,14 @@ static int vu_unregister_cmdline_device(struct device *dev, void *data)
static void vu_conn_broken(struct work_struct *wk)
{
struct virtio_uml_platform_data *pdata;
struct virtio_uml_device *vu_dev;
pdata = container_of(wk, struct virtio_uml_platform_data, conn_broken_wk);
vu_dev = platform_get_drvdata(pdata->pdev);
virtio_break_device(&vu_dev->vdev);
vu_unregister_cmdline_device(&pdata->pdev->dev, NULL);
}