dma/idxd: fix default for workqueue options

When no --wq-option flag is passed to dpdk_idxd_cfg.py script, the
default value used by argparse is None. This leads to later errors which
are expecting an array value:

	TypeError: 'NoneType' object is not iterable

This is fixed by specifying that the empty array should be the default
if no flags are passed.

Fixes: 94b0f04dc0e3 ("dma/idxd: add generic option for queue config")
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Sunil Pai G <sunil.pai.g@intel.com>
Acked-by: Conor Walsh <conor.walsh@intel.com>

diff --git a/drivers/dma/idxd/dpdk_idxd_cfg.py b/drivers/dma/idxd/dpdk_idxd_cfg.py
index 77c473b2406bbb8f438e923de02c666c38fd1612..41b4d13b9c67848140b019293afc985de566b4b3 100755 (executable)
--- a/drivers/dma/idxd/dpdk_idxd_cfg.py
+++ b/drivers/dma/idxd/dpdk_idxd_cfg.py
@@ -122,7 +122,7 @@ def main(args):
     arg_p.add_argument('--name-prefix', metavar='prefix', dest='prefix',
                        default="dpdk",
                        help="Prefix for workqueue name to mark for DPDK use [default: 'dpdk']")
-    arg_p.add_argument('--wq-option', action='append',
+    arg_p.add_argument('--wq-option', action='append', default=[],
                        help="Provide additional config option for queues (format 'x=y')")
     arg_p.add_argument('--reset', action='store_true',
                        help="Reset DSA device and its queues")