search for: set_offline

...k, and passing on device loss information via the surprize_removal flag to the remove callback of the backend driver, can solve this task. v3->v4 changes: - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() callback processing). - patch 2: introduces 'device_lost' atomic in virtio_device and use in backend driver virtio_blk accordingly (original 3 patches merged). - patch 3: the notify() callback is now serialized with remove()/set_offline() callbacks. The notification is ignored...

...k, and passing on device loss information via the surprize_removal flag to the remove callback of the backend driver, can solve this task. v3->v4 changes: - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() callback processing). - patch 2: introduces 'device_lost' atomic in virtio_device and use in backend driver virtio_blk accordingly (original 3 patches merged). - patch 3: the notify() callback is now serialized with remove()/set_offline() callbacks. The notification is ignored...

...the surprize_removal >> flag to the remove callback of the backend driver, can solve this task. >> >> v3->v4 changes: >> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >> callback processing). >> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >> backend driver virtio_blk accordingly (original 3 patches merged). >> - patch 3: the notify() callback is now serialized with remove()/set_offline() &g...

...the surprize_removal >> flag to the remove callback of the backend driver, can solve this task. >> >> v3->v4 changes: >> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >> callback processing). >> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >> backend driver virtio_blk accordingly (original 3 patches merged). >> - patch 3: the notify() callback is now serialized with remove()/set_offline() &g...

...the surprize_removal >> flag to the remove callback of the backend driver, can solve this task. >> >> v3->v4 changes: >> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >> callback processing). >> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >> backend driver virtio_blk accordingly (original 3 patches merged). >> - patch 3: the notify() callback is now serialized with remove()/set_offline() &g...

...the surprize_removal >> flag to the remove callback of the backend driver, can solve this task. >> >> v3->v4 changes: >> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >> callback processing). >> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >> backend driver virtio_blk accordingly (original 3 patches merged). >> - patch 3: the notify() callback is now serialized with remove()/set_offline() &g...

...loss information via the surprize_removal > flag to the remove callback of the backend driver, can solve this task. > > v3->v4 changes: > - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver > (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() > callback processing). > - patch 2: introduces 'device_lost' atomic in virtio_device and use in > backend driver virtio_blk accordingly (original 3 patches merged). > - patch 3: the notify() callback is now serialized with remove()/set_offline() > callbacks. The...

...loss information via the surprize_removal > flag to the remove callback of the backend driver, can solve this task. > > v3->v4 changes: > - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver > (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() > callback processing). > - patch 2: introduces 'device_lost' atomic in virtio_device and use in > backend driver virtio_blk accordingly (original 3 patches merged). > - patch 3: the notify() callback is now serialized with remove()/set_offline() > callbacks. The...

...to the remove callback of the backend driver, can solve this task. >>>> >>>> v3->v4 changes: >>>> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >>>> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >>>> callback processing). >>>> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >>>> backend driver virtio_blk accordingly (original 3 patches merged). >>>> - patch 3: the notify() callback is now seria...

...to the remove callback of the backend driver, can solve this task. >>>> >>>> v3->v4 changes: >>>> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >>>> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >>>> callback processing). >>>> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >>>> backend driver virtio_blk accordingly (original 3 patches merged). >>>> - patch 3: the notify() callback is now seria...

...>>> flag to the remove callback of the backend driver, can solve this task. >>> >>> v3->v4 changes: >>> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >>> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >>> callback processing). >>> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >>> backend driver virtio_blk accordingly (original 3 patches merged). >>> - patch 3: the notify() callback is now serialized with remove()/...

...>>> flag to the remove callback of the backend driver, can solve this task. >>> >>> v3->v4 changes: >>> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >>> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >>> callback processing). >>> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >>> backend driver virtio_blk accordingly (original 3 patches merged). >>> - patch 3: the notify() callback is now serialized with remove()/...

When a CIO_GONE notification is received the device_lost flag is set in the virtio_device. This flag should be tested by a backend in order to be able to prevent triggering final I/O to a device that is not reachable any more. The notification is ignored in case remove or set_offline is already running. The virtio_device pointer might point to freed memory in that case. Signed-off-by: Heinz Graalfs <graalfs at linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck at de.ibm.com> --- drivers/s390/kvm/virtio_ccw.c | 23 +++++++++++++++++++++-- 1 file changed, 21...

...to the remove callback of the backend driver, can solve this task. >>>> >>>> v3->v4 changes: >>>> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >>>> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >>>> callback processing). >>>> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >>>> backend driver virtio_blk accordingly (original 3 patches merged). >>>> - patch 3: the notify() callback is now seria...

...to the remove callback of the backend driver, can solve this task. >>>> >>>> v3->v4 changes: >>>> - patch 1: solves some vcdev pointer handling issues in the virtio_ccw driver >>>> (e.g. locked vcdev pointer reset/query; serialize remove()/set_offline() >>>> callback processing). >>>> - patch 2: introduces 'device_lost' atomic in virtio_device and use in >>>> backend driver virtio_blk accordingly (original 3 patches merged). >>>> - patch 3: the notify() callback is now seria...

...96,8 +1103,26 @@ out_free: static int virtio_ccw_cio_notify(struct ccw_device *cdev, int event) { - /* TODO: Check whether we need special handling here. */ - return 0; + int rc; + struct virtio_ccw_device *vcdev = dev_get_drvdata(&cdev->dev); + + /* + * Make sure vcdev is set + * i.e. set_offline/remove callback not already running + */ + if (!vcdev) + return NOTIFY_DONE; + + switch (event) { + case CIO_GONE: + vcdev->device_lost = true; + rc = NOTIFY_DONE; + break; + default: + rc = NOTIFY_DONE; + break; + } + return rc; } static struct ccw_device_id virtio_ids[] = { -- 1.8....

Rusty, this patch exploits the new function virtio_break_device() as of your patch set dated January 15th on linux-kernel at vger.kernel.org. The patch avoids hang situations during device unregister, when a (block) device with active IO is hot-unplugged. Heinz Graalfs (1): virtio_ccw: introduce device_lost in virtio_ccw_device drivers/s390/kvm/virtio_ccw.c | 49

Rusty, this patch exploits the new function virtio_break_device() as of your patch set dated January 15th on linux-kernel at vger.kernel.org. The patch avoids hang situations during device unregister, when a (block) device with active IO is hot-unplugged. Heinz Graalfs (1): virtio_ccw: introduce device_lost in virtio_ccw_device drivers/s390/kvm/virtio_ccw.c | 49