[PATCH] tools/power: amd_pstate_trace: fix help path dependencies

[Yousef Alhouseen <alhouseenyousef@gmail.com>]

amd_pstate_trace imports Gnuplot and numpy before parsing command-line
options. As a result, even "-h" fails if those optional runtime modules are
not installed.

It also handles "-h" by printing a blank line and exiting. Use the existing
help printer for "-h", and move the numpy import to the path that needs it.
The direct Gnuplot import is unused, so remove it.

Signed-off-by: Yousef Alhouseen <alhouseenyousef@gmail.com>
---
 tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py b/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
index 875b08655..b1b201b2e 100755
--- a/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
+++ b/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
@@ -27,8 +27,6 @@ import re
 import signal
 import sys
 import getopt
-import Gnuplot
-from numpy import *
 from decimal import *
 sys.path.append(os.path.join(os.path.dirname(__file__), "..", "intel_pstate_tracer"))
 import intel_pstate_tracer as ipt
@@ -260,9 +258,6 @@ graph_data_present = False;
 valid1 = False
 valid2 = False
 
-cpu_mask = zeros((MAX_CPUS,), dtype=int)
-
-
 try:
     opts, args = getopt.getopt(sys.argv[1:],"ht:i:c:n:m:",["help","trace_file=","interval=","cpu=","name=","memory="])
 except getopt.GetoptError:
@@ -270,7 +265,7 @@ except getopt.GetoptError:
     sys.exit(2)
 for opt, arg in opts:
     if opt == '-h':
-        print()
+        ipt.print_help('amd_pstate')
         sys.exit()
     elif opt in ("-t", "--trace_file"):
         valid1 = True
@@ -291,6 +286,10 @@ if not (valid1 and valid2):
     ipt.print_help('amd_pstate')
     sys.exit()
 
+from numpy import zeros
+
+cpu_mask = zeros((MAX_CPUS,), dtype=int)
+
 if cpu_list:
     for p in re.split("[,]", cpu_list):
         if int(p) < MAX_CPUS :
-- 
2.54.0