BLK_PM_RUNTIME_INIT(9) Block Devices BLK_PM_RUNTIME_INIT(9)NAMEblk_pm_runtime_init - Block layer runtime PM initialization routine
SYNOPSIS
void blk_pm_runtime_init(struct request_queue * q,
struct device * dev);
ARGUMENTS
q
the queue of the device
dev
the device the queue belongs to
DESCRIPTION
Initialize runtime-PM-related fields for q and start auto suspend for
dev. Drivers that want to take advantage of request-based runtime PM
should call this function after dev has been initialized, and its
request queue q has been allocated, and runtime PM for it can not
happen yet(either due to disabled/forbidden or its usage_count > 0). In
most cases, driver should call this function before any I/O has taken
place.
This function takes care of setting up using auto suspend for the
device, the autosuspend delay is set to -1 to make runtime suspend
impossible until an updated value is either set by user or by driver.
Drivers do not need to touch other autosuspend settings.
The block layer runtime PM is request based, so only works for drivers
that use request as their IO unit instead of those directly use bio's.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 BLK_PM_RUNTIME_INIT(9)
