Hi Anatoly,

On 13/11/2018 4:42 PM, Anatoly Burakov wrote:
If there aren't any devices of a particular category on user's
system, we still display them, which is bad for usability. Fix
devbind to not print out a category unless there are devices in
it.

Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---
  usertools/dpdk-devbind.py | 27 ++++++++++++++++++++-------
  1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/usertools/dpdk-devbind.py b/usertools/dpdk-devbind.py
index 7d564634c..9f190e227 100755
--- a/usertools/dpdk-devbind.py
+++ b/usertools/dpdk-devbind.py
@@ -546,14 +546,27 @@ def show_device_status(devices_type, device_name):
              else:
                  kernel_drv.append(devices[d])
+ n_devs = len(dpdk_drv) + len(kernel_drv) + len(no_drv)
+
+    # don't bother displaying anything if there are no devices
+    if n_devs == 0:
+        msg = "No '%s' devices detected" % device_name
+       print("")
+       print(msg)
+       print("".join('=' * len(msg)))
+        return
+
      # print each category separately, so we can clearly see what's used by 
DPDK
-    display_devices("%s devices using DPDK-compatible driver" % device_name,
-                    dpdk_drv, "drv=%(Driver_str)s unused=%(Module_str)s")
-    display_devices("%s devices using kernel driver" % device_name, kernel_drv,
-                    "if=%(Interface)s drv=%(Driver_str)s "
-                    "unused=%(Module_str)s %(Active)s")
-    display_devices("Other %s devices" % device_name, no_drv,
-                    "unused=%(Module_str)s")
+    if len(dpdk_drv) != 0:
+        display_devices("%s devices using DPDK-compatible driver" % 
device_name,
+                        dpdk_drv, "drv=%(Driver_str)s unused=%(Module_str)s")
+    if len(kernel_drv) != 0:
+        display_devices("%s devices using kernel driver" % device_name, 
kernel_drv,
+                        "if=%(Interface)s drv=%(Driver_str)s "
+                        "unused=%(Module_str)s %(Active)s")
+    if len(no_drv) != 0:
+        display_devices("Other %s devices" % device_name, no_drv,
+                        "unused=%(Module_str)s")
def show_status():
      '''Function called when the script is passed the "--status" option.


I REALLY like this patch. It makes the dpdk-devbind output MUCH more readable!

Reviewed-by: David Hunt <david.h...@intel.com>


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