NVMe get features test fix

For One of the mandatory feature "Interrupt Vector Configuration",
the parameter cdw11 value should be equal to or less than the
number of interrupt vectors. Current implementaion uses the
IRQ number instead. This commit fixes it.

Signed-off-by: Narasimhan V <[email protected]>

Author: narasimhan-v

tests/nvme_get_features_test.py

@@ -45,7 +45,7 @@ class TestNVMeGetMandatoryFeatures(TestNVMe):
         - Attributes:
               - feature_id_list : list of the mandatory features.
               - get_vector_list_cmd : vector list collection for 09h.
-              - vector_list : vector list to hold the interrupt vectors.
+              - vector_list_len : numer of the interrupt vectors.
     """
 
     def __init__(self):
@@ -60,8 +60,7 @@ def __init__(self):
                                 shell=True,
                                 stdout=subprocess.PIPE,
                                 encoding='utf-8')
-        self.vector_list = []
-        self.vector_list = proc.stdout.read().strip().split(" ")
+        self.vector_list_len = len(proc.stdout.read().strip().split(" "))
 
     def __del__(self):
         """ Post Section for TestNVMeGetMandatoryFeatures
@@ -78,7 +77,7 @@ def get_mandatory_features(self, feature_id):
                 - None
         """
         if str(feature_id) == "0x09":
-            for vector in self.vector_list:
+            for vector in range(self.vector_list_len):
                 get_feat_cmd = "nvme get-feature " + self.ctrl + \
                                " --feature-id=" + str(feature_id) + \
                                " --cdw11=" + str(vector)