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Arm SCMI fixes for v6.8

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Few fixes addressing the below issues:
 
 1. A spurious IRQ related to the late reply can get wrongly associated
    with the new enqueued request resulting in misinterpretation of data
    in shared memory. This race-condition can be detected by looking at
    the channel status bits which the platform must set to the channel
    free before triggering the completion IRQ. Adding a consistency check
    to validate such condition will fix the issue.
 2. Incorrect use of asm-generic/bug.h instead of generic linux/bUg.h
 3. xa_store() can't check for possible duplication insertion, use
    xa_insert() instead
 4. Fix the SCMI clock protocol version in the v3.2 SCMI specification
 5. Incorrect upgrade of highest supported clock protocol version from
    v2.0 to v3.0
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Merge tag 'scmi-fixes-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/fixes

Arm SCMI fixes for v6.8

Few fixes addressing the below issues:

1. A spurious IRQ related to the late reply can get wrongly associated
   with the new enqueued request resulting in misinterpretation of data
   in shared memory. This race-condition can be detected by looking at
   the channel status bits which the platform must set to the channel
   free before triggering the completion IRQ. Adding a consistency check
   to validate such condition will fix the issue.
2. Incorrect use of asm-generic/bug.h instead of generic linux/bUg.h
3. xa_store() can't check for possible duplication insertion, use
   xa_insert() instead
4. Fix the SCMI clock protocol version in the v3.2 SCMI specification
5. Incorrect upgrade of highest supported clock protocol version from
   v2.0 to v3.0

* tag 'scmi-fixes-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_scmi: Fix the clock protocol supported version
  firmware: arm_scmi: Fix the clock protocol version for v3.2
  firmware: arm_scmi: Use xa_insert() when saving raw queues
  firmware: arm_scmi: Use xa_insert() to store opps
  firmware: arm_scmi: Replace asm-generic/bug.h with linux/bug.h
  firmware: arm_scmi: Check mailbox/SMT channel for consistency

Link: https://lore.kernel.org/r/20240122161640.3551085-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2024-01-25 18:21:29 +01:00
commit d77b016bc9
6 changed files with 50 additions and 13 deletions
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