msm: dcvs: fail gracefully if TZ does not support dcvs
If dcvs attempts to initialize on a system where TZ does not support
dcvs, it will eventually cause a crash. Prevent this by disabling
dcvs if TZ does not successfully initialize its part of dcvs.
Change-Id: Ic9cd361243c03c3832133614c4847a2815b0bbb4
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
Signed-off-by: Sridhar Gujje <sgujje@codeaurora.org>
diff --git a/arch/arm/mach-msm/msm_dcvs.c b/arch/arm/mach-msm/msm_dcvs.c
index 9e0be63..1a919fc 100644
--- a/arch/arm/mach-msm/msm_dcvs.c
+++ b/arch/arm/mach-msm/msm_dcvs.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -1026,6 +1026,9 @@
uint32_t ret1;
uint32_t ret2;
+ if (!msm_dcvs_enabled)
+ return ret;
+
offset = get_core_offset(type, type_core_num);
if (offset < 0)
return ret;
@@ -1277,6 +1280,9 @@
struct kobject *module_kobj = NULL;
int ret = 0;
+ if (!msm_dcvs_enabled)
+ return ret;
+
module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
if (!module_kobj) {
pr_err("%s: cannot find kobject for module %s\n",
@@ -1343,6 +1349,7 @@
ret = msm_dcvs_scm_init(SZ_32K);
if (ret) {
__err("Unable to initialize DCVS err=%d\n", ret);
+ msm_dcvs_enabled = 0;
goto done;
}