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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-06-12 10:24:13 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-06-12 10:24:13 +0200 |
| commit | b06c0b2f087ab498d51d50f5ae353133b602f614 (patch) | |
| tree | 08209ebe683ce27a9c7f755c8c05b853a407ca6f /drivers/base | |
| parent | 2d5ed61ce9820a1fe7b076cc45c169524d767746 (diff) | |
| download | linux-b06c0b2f087ab498d51d50f5ae353133b602f614.tar.bz2 | |
Revert "PM / runtime: Fixup reference counting of device link suppliers at probe"
Revert commit 1e8378619841 (PM / runtime: Fixup reference counting of
device link suppliers at probe), as it has introduced a regression
and the condition it was designed to address should be covered by the
existing code.
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/dd.c | 3 | ||||
| -rw-r--r-- | drivers/base/power/runtime.c | 27 |
2 files changed, 26 insertions, 4 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index a41c91bfac0e..10454fe54482 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -580,7 +580,7 @@ int driver_probe_device(struct device_driver *drv, struct device *dev) pr_debug("bus: '%s': %s: matched device %s with driver %s\n", drv->bus->name, __func__, dev_name(dev), drv->name); - pm_runtime_resume_suppliers(dev); + pm_runtime_get_suppliers(dev); if (dev->parent) pm_runtime_get_sync(dev->parent); @@ -591,6 +591,7 @@ int driver_probe_device(struct device_driver *drv, struct device *dev) if (dev->parent) pm_runtime_put(dev->parent); + pm_runtime_put_suppliers(dev); return ret; } diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index c6030f100c08..beb85c31f3fa 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -1563,16 +1563,37 @@ void pm_runtime_clean_up_links(struct device *dev) } /** - * pm_runtime_resume_suppliers - Resume supplier devices. + * pm_runtime_get_suppliers - Resume and reference-count supplier devices. * @dev: Consumer device. */ -void pm_runtime_resume_suppliers(struct device *dev) +void pm_runtime_get_suppliers(struct device *dev) { + struct device_link *link; int idx; idx = device_links_read_lock(); - rpm_get_suppliers(dev); + list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) + if (link->flags & DL_FLAG_PM_RUNTIME) + pm_runtime_get_sync(link->supplier); + + device_links_read_unlock(idx); +} + +/** + * pm_runtime_put_suppliers - Drop references to supplier devices. + * @dev: Consumer device. + */ +void pm_runtime_put_suppliers(struct device *dev) +{ + struct device_link *link; + int idx; + + idx = device_links_read_lock(); + + list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) + if (link->flags & DL_FLAG_PM_RUNTIME) + pm_runtime_put(link->supplier); device_links_read_unlock(idx); } |