8b38c538d4
Limit the number of PSV's created through devx to 1, to create a symmetry between create/destroy cmds. In the kernel, one can create up to 4 PSV's using CREATE_PSV cmd but the destruction is one by one. Add a protection for this a-symmetric definition for devx. Link: https://lore.kernel.org/r/20190723070412.6385-1-leon@kernel.org Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>