On Wed, 11 Oct 2017 04:38:22 +0200 Dong Jia Shi <bjsdj...@linux.vnet.ibm.com> wrote:
> If the count field of a ccw is zero, there is no need to > try to pin page(s) for it. Let's check the count value > before starting pinning operations. > > Reviewed-by: Pierre Morel <pmo...@linux.vnet.ibm.com> > Signed-off-by: Dong Jia Shi <bjsdj...@linux.vnet.ibm.com> > --- > drivers/s390/cio/vfio_ccw_cp.c | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) This sounds reasonable, and I could not spot anything in the architecture that speaks against simply setting the IDA flag. Hopefully there's nothing buried out of sight :)
