[PATCH v3 00/15] Refactor SDEI client driver

[Gavin Shan]

This series bases on 5.8-rc7 and refactors the SDEI client driver.
It's the preparatory work of virtualizing SDEI afterwords. The series
is organized as below:

   * PATCH[1-13] refactors and clean up the code. They shouldn't cause
     any functional changes.
   * PATCH[14-15] exposes "struct sdei_event", which will be dereferenced
     on virtualizing SDEI. After it's applied, the SDEI event is identified
     by the instance of "struct sdei_event" instead of event number.

The series can be checked out from:

    git at github.com:gwshan/linux.git
    (branch: "sdei_client")

Testing
=======
I have the SDEI virtualization code implemented as part of KVM module. With
that, the SDEI event can be registered/unregistered/enabled/disabled. Also,
the SDEI event can be injected from host and the guest handler runs properly.

The code can be found from:

   git at github.com:gwshan/linux.git
   (branch: "sdei")

Changelog
=========
v3:
   Rebase to 5.8.rc7                                               (Gavin)
   Pick rbs from Jonathan                                          (Gavin)
   Correct spellings in commit logs                                (Jonathan)
   Rename "out" to "unlock" tag                                    (Jonathan)
   Keep the empty line in sdei_event_unregister()                  (Jonathan)
   Drop tabs between type and field for struct sdei_crosscall_args (Jonathan)
   Use smp_call_func_t for @fn argument in CPU callbacks           (Jonathan)
   Split struct sdei_event into struct sdei_{internal,}_event      (Jonathan)
   Remove last two patches and get it reviewed later               (Jonathan)
v2:
   Rebase to 5.8.rc6                                               (Gavin)
   Improved changelog                                              (James/Gavin)
   Split patches for easy review                                   (Gavin)
   Drop changes to reorder variables                               (James)
   Drop unnecessary (@regs removal) cleanup in sdei_event_create() (James)
   Fix broken case for device-tree in sdei_init()                  (James)

Gavin Shan (15):
  drivers/firmware/sdei: Remove sdei_is_err()
  drivers/firmware/sdei: Common block for failing path in
    sdei_event_create()
  drivers/firmware/sdei: Retrieve event number from event instance
  drivers/firmware/sdei: Avoid nested statements in sdei_init()
  drivers/firmware/sdei: Unregister driver on error in sdei_init()
  drivers/firmware/sdei: Remove duplicate check in sdei_get_conduit()
  drivers/firmware/sdei: Remove Drop redundant error message in
    sdei_probe()
  drivers/firmware/sdei: Remove while loop in sdei_event_register()
  drivers/firmware/sdei: Remove while loop in sdei_event_unregister()
  drivers/firmware/sdei: Cleanup on cross call function
  drivers/firmware/sdei: Introduce sdei_do_local_call()
  drivers/firmware/sdei: Remove _sdei_event_register()
  drivers/firmware/sdei: Remove _sdei_event_unregister()
  drivers/firmware/sdei: Expose struct sdei_event
  drivers/firmware/sdei: Identify event by struct sdei_event

 drivers/firmware/arm_sdei.c | 440 +++++++++++++++++-------------------
 include/linux/arm_sdei.h    |  16 +-
 2 files changed, 215 insertions(+), 241 deletions(-)

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2.23.0