driver core: Add "*" wildcard support to driver_async_probe cmdline param
authorSaravana Kannan <saravanak@google.com>
Wed, 4 May 2022 00:53:43 +0000 (17:53 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 19 May 2022 17:28:24 +0000 (19:28 +0200)
commitf79f662e4cd56f6fd3436dd68057d2ec1f7d2025
tree777d1eb60a26ebdd5700bc20b3094fc2eec77b24
parentbc443c31def574e3bfaed50cb493b8305ad79435
driver core: Add "*" wildcard support to driver_async_probe cmdline param

There's currently no way to use driver_async_probe kernel cmdline param
to enable default async probe for all drivers.  So, add support for "*"
to match with all driver names.  When "*" is used, all other drivers
listed in driver_async_probe are drivers that will NOT match the "*".

For example:
* driver_async_probe=drvA,drvB,drvC
  drvA, drvB and drvC do asynchronous probing.

* driver_async_probe=*
  All drivers do asynchronous probing except those that have set
  PROBE_FORCE_SYNCHRONOUS flag.

* driver_async_probe=*,drvA,drvB,drvC
  All drivers do asynchronous probing except drvA, drvB, drvC and those
  that have set PROBE_FORCE_SYNCHRONOUS flag.

Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Feng Tang <feng.tang@intel.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20220504005344.117803-1-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/admin-guide/kernel-parameters.txt
drivers/base/dd.c