Broken kernels (not-upstream) can provide wrong empty "comm" field.
It causes to segfault while printing in JSON format.
Fixes: 8ecac46a60 ("rdma: Add QP resource tracking information")
Signed-off-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>