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virtio: pci: Tear down VQs in virtio_pci_reset()

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The pages backing the virtqueues for virtio PCI devices are not freed
on reset, despite the virtqueue structure being freed as part of the
driver '->priv_auto' destruction at ->remove() time.

Call virtio_pci_del_vqs() from virtio_pci_reset() to free the virtqueue
pages before freeing the virtqueue structure itself.

Signed-off-by: Will Deacon <willdeacon@google.com>
[ Paul: pick from the Android tree. Rebase to the upstream ]
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Link: 5ed54ccd83
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Will Deacon 2023-03-29 22:24:56 +08:00 • committed by Tom Rini
parent 7804306c80
commit da4e8bb09d
1 changed files with 19 additions and 19 deletions
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38
drivers/virtio/virtio_pci_modern.c
View file

@ -218,25 +218,6 @@ static int virtio_pci_set_status(struct udevice *udev, u8 status)
return 0; return 0;
} }
static int virtio_pci_reset(struct udevice *udev)
{
struct virtio_pci_priv *priv = dev_get_priv(udev);
/* 0 status means a reset */
iowrite8(0, &priv->common->device_status);
/*
* After writing 0 to device_status, the driver MUST wait for a read
* of device_status to return 0 before reinitializing the device.
* This will flush out the status write, and flush in device writes,
* including MSI-X interrupts, if any.
*/
while (ioread8(&priv->common->device_status))
udelay(1000);
return 0;
}
static int virtio_pci_get_features(struct udevice *udev, u64 *features) static int virtio_pci_get_features(struct udevice *udev, u64 *features)
{ {
struct virtio_pci_priv *priv = dev_get_priv(udev); struct virtio_pci_priv *priv = dev_get_priv(udev);
@ -363,6 +344,25 @@ static int virtio_pci_find_vqs(struct udevice *udev, unsigned int nvqs,
return 0; return 0;
} }
static int virtio_pci_reset(struct udevice *udev)
{
struct virtio_pci_priv *priv = dev_get_priv(udev);
/* 0 status means a reset */
iowrite8(0, &priv->common->device_status);
/*
* After writing 0 to device_status, the driver MUST wait for a read
* of device_status to return 0 before reinitializing the device.
* This will flush out the status write, and flush in device writes,
* including MSI-X interrupts, if any.
*/
while (ioread8(&priv->common->device_status))
udelay(1000);
return virtio_pci_del_vqs(udev);
}
static int virtio_pci_notify(struct udevice *udev, struct virtqueue *vq) static int virtio_pci_notify(struct udevice *udev, struct virtqueue *vq)
{ {
struct virtio_pci_priv *priv = dev_get_priv(udev); struct virtio_pci_priv *priv = dev_get_priv(udev);