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authorBaolin Wang <baolin.wang@linaro.org>2019-10-14 15:07:44 +0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-11-08 16:42:00 -0800
commita6fc49051cdb847428edf189023b087c1b4fc598 (patch)
treed36ff35ed3692da944687858906450e5ece87fc5 /drivers/hwspinlock
parentb2547dce4d4a23e8c4a2b0258e3bd31d43dddfad (diff)
downloadlwn-a6fc49051cdb847428edf189023b087c1b4fc598.tar.gz
lwn-a6fc49051cdb847428edf189023b087c1b4fc598.zip
hwspinlock: Let the PM runtime can be optional
Now some hwspinlock controllers did not have the requirement to implement the PM runtime, but drivers must enable the PM runtime to comply with the hwspinlock core. Thus we can change the PM runtime support to be optional by validating the -EACCES error number which means the PM runtime is not enabled, and removing the return value validating of pm_runtime_put(). So that we can remove some redundant PM runtime code in drivers. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/hwspinlock')
-rw-r--r--drivers/hwspinlock/hwspinlock_core.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index a22e252c46fc..fd5f5c5a5244 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -657,13 +657,15 @@ static int __hwspin_lock_request(struct hwspinlock *hwlock)
/* notify PM core that power is now needed */
ret = pm_runtime_get_sync(dev);
- if (ret < 0) {
+ if (ret < 0 && ret != -EACCES) {
dev_err(dev, "%s: can't power on device\n", __func__);
pm_runtime_put_noidle(dev);
module_put(dev->driver->owner);
return ret;
}
+ ret = 0;
+
/* mark hwspinlock as used, should not fail */
tmp = radix_tree_tag_clear(&hwspinlock_tree, hwlock_to_id(hwlock),
HWSPINLOCK_UNUSED);
@@ -820,9 +822,7 @@ int hwspin_lock_free(struct hwspinlock *hwlock)
}
/* notify the underlying device that power is not needed */
- ret = pm_runtime_put(dev);
- if (ret < 0)
- goto out;
+ pm_runtime_put(dev);
/* mark this hwspinlock as available */
tmp = radix_tree_tag_set(&hwspinlock_tree, hwlock_to_id(hwlock),