1BLK_PM_RUNTIME_INIT(9)           Block Devices          BLK_PM_RUNTIME_INIT(9)
2
3
4

NAME

6       blk_pm_runtime_init - Block layer runtime PM initialization routine
7

SYNOPSIS

9       void blk_pm_runtime_init(struct request_queue * q,
10                                struct device * dev);
11

ARGUMENTS

13       q
14           the queue of the device
15
16       dev
17           the device the queue belongs to
18

DESCRIPTION

20       Initialize runtime-PM-related fields for q and start auto suspend for
21       dev. Drivers that want to take advantage of request-based runtime PM
22       should call this function after dev has been initialized, and its
23       request queue q has been allocated, and runtime PM for it can not
24       happen yet(either due to disabled/forbidden or its usage_count > 0). In
25       most cases, driver should call this function before any I/O has taken
26       place.
27
28       This function takes care of setting up using auto suspend for the
29       device, the autosuspend delay is set to -1 to make runtime suspend
30       impossible until an updated value is either set by user or by driver.
31       Drivers do not need to touch other autosuspend settings.
32
33       The block layer runtime PM is request based, so only works for drivers
34       that use request as their IO unit instead of those directly use bio's.
35

37Kernel Hackers Manual 3.10         June 2019            BLK_PM_RUNTIME_INIT(9)
Impressum