tools/power/x86/intel-speed-select: Always invoke isst_fill_platform_info

isst_fill_platform_info fills platform specific information.
And it is the proper place to set platform specific callbacks, as done in
next patch.

As the platform specific callbacks are needed in all cases, including
isst_print_platform_information.

The best way to achieve both is to invoke isst_fill_platform_info
unconditionally, and make isst_print_platform_information leverage the
data already filled.

No functional changes are expected.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

tools/power/x86/intel-speed-select/isst-config.c

@@ -803,6 +803,9 @@ static int isst_fill_platform_info(void)
 	const char *pathname = "/dev/isst_interface";
 	int fd;
 
+	if (is_clx_n_platform())
+		return 0;
+
 	fd = open(pathname, O_RDWR);
 	if (fd < 0)
 		err(-1, "%s open failed", pathname);
@@ -911,10 +914,6 @@ static void isst_print_extended_platform_info(void)
 
 static void isst_print_platform_information(void)
 {
-	struct isst_if_platform_info platform_info;
-	const char *pathname = "/dev/isst_interface";
-	int fd;
-
 	if (is_clx_n_platform()) {
 		fprintf(stderr, "\nThis option in not supported on this platform\n");
 		exit(0);
@@ -924,25 +923,15 @@ static void isst_print_platform_information(void)
 	set_max_cpu_num();
 	create_cpu_map();
 
-	fd = open(pathname, O_RDWR);
-	if (fd < 0)
-		err(-1, "%s open failed", pathname);
-
-	if (ioctl(fd, ISST_IF_GET_PLATFORM_INFO, &platform_info) == -1) {
-		perror("ISST_IF_GET_PLATFORM_INFO");
-	} else {
-		fprintf(outf, "Platform: API version : %d\n",
-			platform_info.api_version);
-		fprintf(outf, "Platform: Driver version : %d\n",
-			platform_info.driver_version);
-		fprintf(outf, "Platform: mbox supported : %d\n",
-			platform_info.mbox_supported);
-		fprintf(outf, "Platform: mmio supported : %d\n",
-			platform_info.mmio_supported);
-		isst_print_extended_platform_info();
-	}
-
-	close(fd);
+	fprintf(outf, "Platform: API version : %d\n",
+		isst_platform_info.api_version);
+	fprintf(outf, "Platform: Driver version : %d\n",
+		isst_platform_info.driver_version);
+	fprintf(outf, "Platform: mbox supported : %d\n",
+		isst_platform_info.mbox_supported);
+	fprintf(outf, "Platform: mmio supported : %d\n",
+		isst_platform_info.mmio_supported);
+	isst_print_extended_platform_info();
 
 	exit(0);
 }
@@ -2832,6 +2821,10 @@ static void cmdline(int argc, char **argv)
 		fclose(fp);
 	}
 
+	ret = isst_fill_platform_info();
+	if (ret)
+		goto out;
+
 	progname = argv[0];
 	while ((opt = getopt_long_only(argc, argv, "+c:df:hio:vabw:n", long_options,
 				       &option_index)) != -1) {
@@ -2922,9 +2915,6 @@ static void cmdline(int argc, char **argv)
 	}
 
 	if (!is_clx_n_platform()) {
-		ret = isst_fill_platform_info();
-		if (ret)
-			goto out;
 		process_command(argc, argv, isst_help_cmds, isst_cmds);
 	} else {
 		process_command(argc, argv, clx_n_help_cmds, clx_n_cmds);