mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 22:54:01 +00:00
Code Issues Releases Wiki Activity

phy: core: Invoke pm_runtime_get_*/pm_runtime_put_* before invoking reset callback

Browse source 
PHY drivers may try to access PHY registers in the ->reset() callback.
Invoke phy_pm_runtime_get_sync() before invoking the ->reset() callback
so that the PHY drivers don't have to enable clocks by themselves before
accessing PHY registers.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Kishon Vijay Abraham I 2019-04-05 16:38:31 +05:30
parent fec06b2bc4
commit 4df614c4ab
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/phy/phy-core.c
View file

@ -384,10 +384,16 @@ int phy_reset(struct phy *phy)
if (!phy || !phy->ops->reset)
return 0;
ret = phy_pm_runtime_get_sync(phy);
if (ret < 0 && ret != -ENOTSUPP)
return ret;
mutex_lock(&phy->mutex);
ret = phy->ops->reset(phy);
mutex_unlock(&phy->mutex);
phy_pm_runtime_put(phy);
return ret;
}
EXPORT_SYMBOL_GPL(phy_reset);