cpufreq: amd-pstate-ut: Skip tests when amd-pstate driver is not active

The crash issue may occur when modprobe amd_pstate_ut on intel platform.

   amd_pstate_ut: 1    amd_pstate_ut_acpi_cpc_valid  success!
   amd_pstate_ut: 2    amd_pstate_ut_check_enabled   success!
   BUG: kernel NULL pointer dereference, address: 0000000000000080
   #PF: supervisor read access in kernel mode
   #PF: error_code(0x0000) - not-present page
   PGD 0 P4D 0
   Oops: 0000 [#1] SMP NOPTI
   CPU: 0 PID: 20300 Comm: modprobe
   Kdump: loaded Tainted: G O 6.6.0-0010.rc1.ctl4.x86_64 #1
   Hardware name: FiberHome R2200 V5/Xeon Boards, BIOS 3.1a 02/24/2020
   RIP: 0010:amd_pstate_ut_check_perf+0x141/0x280 [amd_pstate_ut]
   Call Trace:
    <TASK>
    amd_pstate_ut_init+0x1b/0xff0 [amd_pstate_ut]
    ? __pfx_amd_pstate_ut_init+0x10/0x10 [amd_pstate_ut]
    do_one_initcall+0x42/0x2e0
    ? kmalloc_trace+0x26/0x90
    do_init_module+0x60/0x240
    __se_sys_init_module+0x185/0x1c0
    do_syscall_64+0x62/0x190
    entry_SYSCALL_64_after_hwframe+0x76/0x7e
    </TASK>

Add state detection to amd pstate driver to prevent amd_pstate_ut driver
from testing on non-AMD platforms.

Fixes: 14eb1c96e3a3 ("cpufreq: amd-pstate: Add test module for amd-pstate driver")
Suggested-by: Li Xiong <xiongl24@chinatelecom.cn>
Suggested-by: Xibo Wang <wangxb12@chinatelecom.cn>
Signed-off-by: Qianheng Peng <pengqh1@chinatelecom.cn>
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Link: https://lore.kernel.org/r/1784191899-28957-1-git-send-email-pengqh1@chinatelecom.cn
(ML: adjust title)
Signed-off-by: Mario Limonciello <superm1@kernel.org>

0 files changed, 0 insertions, 0 deletions