vfio-ccw: Skip second copy of guest cp to host

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We already pinned/copied/unpinned 2K (256 CCWs) of guest memory
to the host space anchored off vfio_ccw_private.  There's no need
to do that again once we have the length calculated, when we could
just copy the section we need to the "permanent" space for the I/O.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20190618202352.39702-3-farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

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Eric Farman 2019-06-18 22:23:49 +02:00 • committed by Cornelia Huck

parent 1d897e478d

commit 6246590230

1 changed files with 3 additions and 7 deletions

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drivers/s390/cio/vfio_ccw_cp.c

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