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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-12-21 21:59:45 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-12-21 21:59:45 +0100 |
| commit | b00f4dc5ff022cb9cbaffd376d9454d7fa1e496f (patch) | |
| tree | 40f1b232e2f1e8ac365317a14fdcbcb331722b46 /drivers/virtio/virtio_pci.c | |
| parent | PM / Sleep: Merge internal functions in generic_ops.c (diff) | |
| parent | Merge git://git.infradead.org/mtd-2.6 (diff) | |
| download | linux-b00f4dc5ff022cb9cbaffd376d9454d7fa1e496f.tar.xz linux-b00f4dc5ff022cb9cbaffd376d9454d7fa1e496f.zip | |
Merge branch 'master' into pm-sleep
* master: (848 commits)
SELinux: Fix RCU deref check warning in sel_netport_insert()
binary_sysctl(): fix memory leak
mm/vmalloc.c: remove static declaration of va from __get_vm_area_node
ipmi_watchdog: restore settings when BMC reset
oom: fix integer overflow of points in oom_badness
memcg: keep root group unchanged if creation fails
nilfs2: potential integer overflow in nilfs_ioctl_clean_segments()
nilfs2: unbreak compat ioctl
cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask
evm: prevent racing during tfm allocation
evm: key must be set once during initialization
mmc: vub300: fix type of firmware_rom_wait_states module parameter
Revert "mmc: enable runtime PM by default"
mmc: sdhci: remove "state" argument from sdhci_suspend_host
x86, dumpstack: Fix code bytes breakage due to missing KERN_CONT
IB/qib: Correct sense on freectxts increment and decrement
RDMA/cma: Verify private data length
cgroups: fix a css_set not found bug in cgroup_attach_proc
oprofile: Fix uninitialized memory access when writing to writing to oprofilefs
Revert "xen/pv-on-hvm kexec: add xs_reset_watches to shutdown watches from old kernel"
...
Conflicts:
kernel/cgroup_freezer.c
Diffstat (limited to 'drivers/virtio/virtio_pci.c')
| -rw-r--r-- | drivers/virtio/virtio_pci.c | 18 |
1 files changed, 18 insertions, 0 deletions
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 */ |