https://github.com/torvalds/linux
Revision c2d2e6738a209f0f9dffa2dc8e7292fc45360d61 authored by Jason Andryuk on 28 February 2018, 12:23:23 UTC, committed by Juergen Gross on 28 February 2018, 19:20:08 UTC
A toolstack may delete the vif frontend and backend xenstore entries
while xen-netfront is in the removal code path. In that case, the
checks for xenbus_read_driver_state would return XenbusStateUnknown, and
xennet_remove would hang indefinitely. This hang prevents system
shutdown.
xennet_remove must be able to handle XenbusStateUnknown, and
netback_changed must also wake up the wake_queue for that state as well.
Fixes: 5b5971df3bc2 ("xen-netfront: remove warning when unloading module")
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Cc: Eduardo Otubo <otubo@redhat.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
1 parent 910f8be
Tip revision: c2d2e6738a209f0f9dffa2dc8e7292fc45360d61 authored by Jason Andryuk on 28 February 2018, 12:23:23 UTC
xen-netfront: Fix hang on device removal
xen-netfront: Fix hang on device removal
Tip revision: c2d2e67
| File | Mode | Size |
|---|---|---|
| partitions | ||
| Kconfig | -rw-r--r-- | 6.2 KB |
| Kconfig.iosched | -rw-r--r-- | 2.7 KB |
| Makefile | -rw-r--r-- | 1.5 KB |
| badblocks.c | -rw-r--r-- | 14.5 KB |
| bfq-cgroup.c | -rw-r--r-- | 33.6 KB |
| bfq-iosched.c | -rw-r--r-- | 181.6 KB |
| bfq-iosched.h | -rw-r--r-- | 31.9 KB |
| bfq-wf2q.c | -rw-r--r-- | 52.2 KB |
| bio-integrity.c | -rw-r--r-- | 13.8 KB |
| bio.c | -rw-r--r-- | 49.0 KB |
| blk-cgroup.c | -rw-r--r-- | 37.8 KB |
| blk-core.c | -rw-r--r-- | 101.8 KB |
| blk-exec.c | -rw-r--r-- | 2.9 KB |
| blk-flush.c | -rw-r--r-- | 17.0 KB |
| blk-integrity.c | -rw-r--r-- | 12.1 KB |
| blk-ioc.c | -rw-r--r-- | 11.0 KB |
| blk-lib.c | -rw-r--r-- | 10.8 KB |
| blk-map.c | -rw-r--r-- | 5.9 KB |
| blk-merge.c | -rw-r--r-- | 20.3 KB |
| blk-mq-cpumap.c | -rw-r--r-- | 1.7 KB |
| blk-mq-debugfs.c | -rw-r--r-- | 23.5 KB |
| blk-mq-debugfs.h | -rw-r--r-- | 2.1 KB |
| blk-mq-pci.c | -rw-r--r-- | 1.6 KB |
| blk-mq-rdma.c | -rw-r--r-- | 1.7 KB |
| blk-mq-sched.c | -rw-r--r-- | 15.9 KB |
| blk-mq-sched.h | -rw-r--r-- | 2.8 KB |
| blk-mq-sysfs.c | -rw-r--r-- | 8.1 KB |
| blk-mq-tag.c | -rw-r--r-- | 11.3 KB |
| blk-mq-tag.h | -rw-r--r-- | 2.3 KB |
| blk-mq-virtio.c | -rw-r--r-- | 1.7 KB |
| blk-mq.c | -rw-r--r-- | 78.0 KB |
| blk-mq.h | -rw-r--r-- | 6.5 KB |
| blk-settings.c | -rw-r--r-- | 28.7 KB |
| blk-softirq.c | -rw-r--r-- | 4.3 KB |
| blk-stat.c | -rw-r--r-- | 4.8 KB |
| blk-stat.h | -rw-r--r-- | 5.5 KB |
| blk-sysfs.c | -rw-r--r-- | 24.4 KB |
| blk-tag.c | -rw-r--r-- | 10.0 KB |
| blk-throttle.c | -rw-r--r-- | 68.8 KB |
| blk-timeout.c | -rw-r--r-- | 6.1 KB |
| blk-wbt.c | -rw-r--r-- | 17.6 KB |
| blk-wbt.h | -rw-r--r-- | 4.0 KB |
| blk-zoned.c | -rw-r--r-- | 8.6 KB |
| blk.h | -rw-r--r-- | 10.2 KB |
| bounce.c | -rw-r--r-- | 6.9 KB |
| bsg-lib.c | -rw-r--r-- | 7.5 KB |
| bsg.c | -rw-r--r-- | 22.6 KB |
| cfq-iosched.c | -rw-r--r-- | 127.1 KB |
| cmdline-parser.c | -rw-r--r-- | 4.9 KB |
| compat_ioctl.c | -rw-r--r-- | 10.9 KB |
| deadline-iosched.c | -rw-r--r-- | 13.2 KB |
| elevator.c | -rw-r--r-- | 27.3 KB |
| genhd.c | -rw-r--r-- | 48.2 KB |
| ioctl.c | -rw-r--r-- | 15.2 KB |
| ioprio.c | -rw-r--r-- | 5.0 KB |
| kyber-iosched.c | -rw-r--r-- | 21.7 KB |
| mq-deadline.c | -rw-r--r-- | 19.7 KB |
| noop-iosched.c | -rw-r--r-- | 2.6 KB |
| opal_proto.h | -rw-r--r-- | 9.3 KB |
| partition-generic.c | -rw-r--r-- | 16.8 KB |
| scsi_ioctl.c | -rw-r--r-- | 19.2 KB |
| sed-opal.c | -rw-r--r-- | 58.5 KB |
| t10-pi.c | -rw-r--r-- | 4.9 KB |
Computing file changes ...
