xen/events/fifo: reset control block and local HEADs on resume

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commit c12784c3d1 upstream.

When using the FIFO-based event channel ABI, if the control block or
the local HEADs are not reset after resuming the guest may see stale
HEAD values and will fail to traverse the FIFO correctly.

This may prevent one or more VCPUs from receiving any events following
a resume.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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David Vrabel 2014-07-31 16:22:24 +01:00 • committed by Greg Kroah-Hartman

parent 062475fc40

commit d52143d85c

1 changed files with 28 additions and 20 deletions

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drivers/xen/events/events_fifo.c

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