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mei: me: enable asynchronous probing

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On some platforms, currently Broxton, Apollo Lake and Kaby Lake,
ME FW may be busy with internal bookkeeping and answering late
to the start message.
As a mitigation, the driver requests for a synchronous probing
to prevent stalling of the overall boot process. For example,
on a Apollo Lake platform the overall boot time has reduced from
~0.9 to ~0.6 seconds on average.

Signed-off-by: Alexander Usyskin <[email protected]>
Signed-off-by: Tomas Winkler <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Alexander Usyskin 2017-06-29 09:40:02 +03:00 • committed by Greg Kroah-Hartman
commit 67de6bf1e4
1 changed files with 1 additions and 0 deletions
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1
drivers/misc/mei/pci-me.c
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@ -485,6 +485,7 @@ static struct pci_driver mei_me_driver = {
.remove = mei_me_remove,
.shutdown = mei_me_shutdown,
.driver.pm = MEI_ME_PM_OPS,
.driver.probe_type = PROBE_PREFER_ASYNCHRONOUS,
};
module_pci_driver(mei_me_driver);