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authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-23 20:19:31 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-23 20:19:31 -0800
commit9b82e65d65c90faecc408bcdc14a0229736ed193 (patch)
tree2cf5fd4f4df01c6488afd0046325405381a73e36 /drivers
parent8174a06eba10a43375d1dd6f74c58a71519e3be5 (diff)
parente6af578c5305be693a1bc7f4dc7b51dd82d41425 (diff)
downloadblackbird-op-linux-9b82e65d65c90faecc408bcdc14a0229736ed193.tar.gz
blackbird-op-linux-9b82e65d65c90faecc408bcdc14a0229736ed193.zip
Merge git://github.com/rustyrussell/linux
* git://github.com/rustyrussell/linux: virtio-pci: make reset operation safer virtio-mmio: Correct the name of the guest features selector virtio: add HAS_IOMEM dependency to MMIO platform bus driver
Diffstat (limited to 'drivers')
-rw-r--r--drivers/virtio/Kconfig2
-rw-r--r--drivers/virtio/virtio_mmio.c2
-rw-r--r--drivers/virtio/virtio_pci.c18
3 files changed, 20 insertions, 2 deletions
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 816ed08e7cf3..1a61939b85fc 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -37,7 +37,7 @@ config VIRTIO_BALLOON
config VIRTIO_MMIO
tristate "Platform bus driver for memory mapped virtio devices (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ depends on HAS_IOMEM && EXPERIMENTAL
select VIRTIO
select VIRTIO_RING
---help---
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index acc5e43c373e..7317dc2ec426 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -118,7 +118,7 @@ static void vm_finalize_features(struct virtio_device *vdev)
vring_transport_features(vdev);
for (i = 0; i < ARRAY_SIZE(vdev->features); i++) {
- writel(i, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SET);
+ writel(i, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SEL);
writel(vdev->features[i],
vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
}
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index 3d1bf41e8892..03d1984bd363 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -169,11 +169,29 @@ static void vp_set_status(struct virtio_device *vdev, u8 status)
iowrite8(status, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
}
+/* wait for pending irq handlers */
+static void vp_synchronize_vectors(struct virtio_device *vdev)
+{
+ struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+ int i;
+
+ if (vp_dev->intx_enabled)
+ synchronize_irq(vp_dev->pci_dev->irq);
+
+ for (i = 0; i < vp_dev->msix_vectors; ++i)
+ synchronize_irq(vp_dev->msix_entries[i].vector);
+}
+
static void vp_reset(struct virtio_device *vdev)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
/* 0 status means a reset. */
iowrite8(0, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
+ /* Flush out the status write, and flush in device writes,
+ * including MSi-X interrupts, if any. */
+ ioread8(vp_dev->ioaddr + VIRTIO_PCI_STATUS);
+ /* Flush pending VQ/configuration callbacks. */
+ vp_synchronize_vectors(vdev);
}
/* the notify function used when creating a virt queue */
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