diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-08 13:05:56 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-08 13:05:56 -0800 |
commit | b11ecb2785b94e931b445fc0ae3e7447e16b2c49 (patch) | |
tree | fc4f6fe211fe2bf0d27ca98b93e7349a566dd4e4 /drivers | |
parent | 1c169383c8b6375f37c17ebd8f9e350d820f2ad3 (diff) | |
parent | 99975cc6ada0d5f2675e83abecae05aba5f437d2 (diff) | |
download | linux-b11ecb2785b94e931b445fc0ae3e7447e16b2c49.tar.bz2 |
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
pull virtio/vhost fixes from Michael Tsirkin:
"This fixes a couple of bugs triggered by hot-unplug of virtio devices,
as well as a regression in vhost-net"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost/net: length miscalculation
virtio_pci: document why we defer kfree
virtio_pci: defer kfree until release callback
virtio_pci: device-specific release callback
virtio: make del_vqs idempotent
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/vhost/net.c | 2 | ||||
-rw-r--r-- | drivers/virtio/virtio_pci_common.c | 10 | ||||
-rw-r--r-- | drivers/virtio/virtio_pci_common.h | 1 | ||||
-rw-r--r-- | drivers/virtio/virtio_pci_legacy.c | 12 |
4 files changed, 13 insertions, 12 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 14419a8ccbb6..d415d69dc237 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -538,7 +538,7 @@ static int get_rx_bufs(struct vhost_virtqueue *vq, ++headcount; seg += in; } - heads[headcount - 1].len = cpu_to_vhost32(vq, len - datalen); + heads[headcount - 1].len = cpu_to_vhost32(vq, len + datalen); *iovcount = seg; if (unlikely(log)) *log_num = nlogs; diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 2ef9529809d8..9756f21b809e 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -282,6 +282,7 @@ void vp_del_vqs(struct virtio_device *vdev) vp_free_vectors(vdev); kfree(vp_dev->vqs); + vp_dev->vqs = NULL; } static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs, @@ -421,15 +422,6 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu) return 0; } -void virtio_pci_release_dev(struct device *_d) -{ - /* - * No need for a release method as we allocate/free - * all devices together with the pci devices. - * Provide an empty one to avoid getting a warning from core. - */ -} - #ifdef CONFIG_PM_SLEEP static int virtio_pci_freeze(struct device *dev) { diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index adddb647b21d..5a497289b7e9 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -126,7 +126,6 @@ const char *vp_bus_name(struct virtio_device *vdev); * - ignore the affinity request if we're using INTX */ int vp_set_vq_affinity(struct virtqueue *vq, int cpu); -void virtio_pci_release_dev(struct device *); int virtio_pci_legacy_probe(struct pci_dev *pci_dev, const struct pci_device_id *id); diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c index 6c76f0f5658c..a5486e65e04b 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -211,6 +211,17 @@ static const struct virtio_config_ops virtio_pci_config_ops = { .set_vq_affinity = vp_set_vq_affinity, }; +static void virtio_pci_release_dev(struct device *_d) +{ + struct virtio_device *vdev = dev_to_virtio(_d); + struct virtio_pci_device *vp_dev = to_vp_device(vdev); + + /* As struct device is a kobject, it's not safe to + * free the memory (including the reference counter itself) + * until it's release callback. */ + kfree(vp_dev); +} + /* the PCI probing function */ int virtio_pci_legacy_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) @@ -302,5 +313,4 @@ void virtio_pci_legacy_remove(struct pci_dev *pci_dev) pci_iounmap(pci_dev, vp_dev->ioaddr); pci_release_regions(pci_dev); pci_disable_device(pci_dev); - kfree(vp_dev); } |