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| author | Luis R. Rodriguez <mcgrof@kernel.org> | 2017-05-02 10:31:05 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-03 12:15:49 +0200 |
| commit | 81f95076281fdd3bc382e004ba1bce8e82fccbce (patch) | |
| tree | 59cf64e1d454e740af39a4f397ee44c8f822b389 /Documentation/driver-api/firmware | |
| parent | firmware: always enable the reboot notifier (diff) | |
| download | linux-81f95076281fdd3bc382e004ba1bce8e82fccbce.tar.xz linux-81f95076281fdd3bc382e004ba1bce8e82fccbce.zip | |
firmware: add sanity check on shutdown/suspend
The firmware API should not be used after we go to suspend
and after we reboot/halt. The suspend/resume case is a bit
complex, so this documents that so things are clearer.
We want to know about users of the API in incorrect places so
that their callers are corrected, so this also adds a warn
for those cases.
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/driver-api/firmware')
| -rw-r--r-- | Documentation/driver-api/firmware/request_firmware.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/driver-api/firmware/request_firmware.rst b/Documentation/driver-api/firmware/request_firmware.rst index cc0aea880824..1c2c4967cd43 100644 --- a/Documentation/driver-api/firmware/request_firmware.rst +++ b/Documentation/driver-api/firmware/request_firmware.rst @@ -44,6 +44,17 @@ request_firmware_nowait .. kernel-doc:: drivers/base/firmware_class.c :functions: request_firmware_nowait +Considerations for suspend and resume +===================================== + +During suspend and resume only the built-in firmware and the firmware cache +elements of the firmware API can be used. This is managed by fw_pm_notify(). + +fw_pm_notify +------------ +.. kernel-doc:: drivers/base/firmware_class.c + :functions: fw_pm_notify + request firmware API expected driver use ======================================== |