driver: therm_fan_est: fix lockdep annotation

Fix lockdep warning by moving rwlock_init(&est_data->state_lock)
before using.

Warning fixed:
  INFO: trying to register non-static key.
  the code is fine but needs lockdep annotation.
  turning off the locking correctness validator.
  ....
  Call trace:
  [<ffffff800808ccb0>] dump_backtrace+0x0/0x1a0
  [<ffffff800808d354>] show_stack+0x24/0x30
  [<ffffff80084ce2f0>] dump_stack+0xa8/0xd8
  [<ffffff800812f8cc>] register_lock_class+0x4fc/0x538
  [<ffffff8008133efc>] __lock_acquire+0x7c/0x748
  [<ffffff80081349cc>] lock_acquire+0xc4/0x290
  [<ffffff80090ad35c>] _raw_read_lock+0x4c/0x60
  [<ffffff80088ab550>] therm_fan_est_get_trip_temp+0x38/0x138
  [<ffffff8008c60148>] thermal_zone_device_register+0x230/0x778
  [<ffffff80088ace68>] therm_fan_est_probe+0xa40/0xc48

Bug 200464909

Change-Id: I60d038a729e018edf260b4d83ecee278a9816b31
Signed-off-by: sumitg <sumitg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2030043
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Nat Pettipaw <npettipaw@nvidia.com>
Reviewed-by: Vinayak Pane <vpane@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/misc/therm_fan_est.c b/drivers/misc/therm_fan_est.c
index 2f6b73e13..318d711e7 100644
--- a/drivers/misc/therm_fan_est.c
+++ b/drivers/misc/therm_fan_est.c
@@ -825,6 +825,8 @@ static int therm_fan_est_probe(struct platform_device *pdev)
         else
                 est_data->is_pid_gov = false;
 
+        rwlock_init(&est_data->state_lock);
+
         est_data->tzp = tzp;
         est_data->thz = thermal_zone_device_register(
                                         (char *)dev_name(&pdev->dev),
@@ -837,8 +839,6 @@ static int therm_fan_est_probe(struct platform_device *pdev)
         }
         pr_info("THERMAL EST: thz register success.\n");
 
-        rwlock_init(&est_data->state_lock);
-
         /* workqueue related */
         est_data->workqueue = alloc_workqueue(dev_name(&pdev->dev),
                                     WQ_HIGHPRI | WQ_UNBOUND, 1);