tools/power turbostat: option '-n' is ambiguous

In some cases specifying the '-n' command line argument will cause
turbostat to fail.  For instance 'turbostat -n 1' works fine; however,
'turbostat -n 1 -d' will fail.  This is the result of the first call
to getopt_long_only() where "MP" is specified as the optstring.  This can
be easily fixed by changing the optstring from "MP" to "MPn:" to remove
ambiguity between the arguments.

tools/power turbostat: option '-n' is ambiguous; possibilities: '-num_iterations' '-no-msr' '-no-perf'

Fixes: a0e86c90b83c ("tools/power turbostat: Add --no-perf option")
Signed-off-by: David Arcari <darcari@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 8cdf41906e98184b7a1a1498de08620d4263d490..12c1872aa42e3010a37e753ae050d1c0ae91b066 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -8424,7 +8424,7 @@ void cmdline(int argc, char **argv)
         * Parse some options early, because they may make other options invalid,
         * like adding the MSR counter with --add and at the same time using --no-msr.
         */
-       while ((opt = getopt_long_only(argc, argv, "MP", long_options, &option_index)) != -1) {
+       while ((opt = getopt_long_only(argc, argv, "MPn:", long_options, &option_index)) != -1) {
                switch (opt) {
                case 'M':
                        no_msr = 1;