Make a separate function for the part of device_shutdown() that does the shutown for a single device. This is in preparation for making device shutdown asynchronous.
Signed-off-by: Stuart Hayes <[email protected]> Signed-off-by: David Jeffery <[email protected]> Tested-by: Laurence Oberman <[email protected]> Reviewed-by: Martin K. Petersen <[email protected]> Reviewed-by: Pasha Tatashin <[email protected]> --- drivers/base/core.c | 65 ++++++++++++++++++++++++--------------------- 1 file changed, 35 insertions(+), 30 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index e8a62c8f0ad3..7fe3fa6870a7 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -4903,6 +4903,40 @@ int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid) return error; } +static void shutdown_one_device(struct device *dev, struct device *parent) +{ + /* hold lock to avoid race with probe/release */ + if (parent) + device_lock(parent); + device_lock(dev); + + /* Don't allow any more runtime suspends */ + pm_runtime_get_noresume(dev); + pm_runtime_barrier(dev); + + if (dev->class && dev->class->shutdown_pre) { + if (initcall_debug) + dev_info(dev, "shutdown_pre\n"); + dev->class->shutdown_pre(dev); + } + if (dev->bus && dev->bus->shutdown) { + if (initcall_debug) + dev_info(dev, "shutdown\n"); + dev->bus->shutdown(dev); + } else if (dev->driver && dev->driver->shutdown) { + if (initcall_debug) + dev_info(dev, "shutdown\n"); + dev->driver->shutdown(dev); + } + + device_unlock(dev); + if (parent) + device_unlock(parent); + + put_device(dev); + put_device(parent); +} + /** * device_shutdown - call ->shutdown() on each device to shutdown. */ @@ -4940,36 +4974,7 @@ void device_shutdown(void) list_del_init(&dev->kobj.entry); spin_unlock(&devices_kset->list_lock); - /* hold lock to avoid race with probe/release */ - if (parent) - device_lock(parent); - device_lock(dev); - - /* Don't allow any more runtime suspends */ - pm_runtime_get_noresume(dev); - pm_runtime_barrier(dev); - - if (dev->class && dev->class->shutdown_pre) { - if (initcall_debug) - dev_info(dev, "shutdown_pre\n"); - dev->class->shutdown_pre(dev); - } - if (dev->bus && dev->bus->shutdown) { - if (initcall_debug) - dev_info(dev, "shutdown\n"); - dev->bus->shutdown(dev); - } else if (dev->driver && dev->driver->shutdown) { - if (initcall_debug) - dev_info(dev, "shutdown\n"); - dev->driver->shutdown(dev); - } - - device_unlock(dev); - if (parent) - device_unlock(parent); - - put_device(dev); - put_device(parent); + shutdown_one_device(dev, parent); spin_lock(&devices_kset->list_lock); } -- 2.55.0
