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27 March 2024, 02:37:15 UTC
Revision 9b80f0f73ae1583c22325ede341c74195847618c authored by Lv Zheng on 15 June 2014, 00:41:48 UTC, committed by Rafael J. Wysocki on 07 July 2014, 10:54:03 UTC 
ACPI / EC: Remove duplicated ec_wait_ibf0() waiter
 
After we've added the first command byte write into advance_transaction(),
the IBF=0 waiter is duplicated with the command completion waiter
implemented in the ec_poll() because:
   If IBF=1 blocked the first command byte write invoked in the task
   context ec_poll(), it would be kicked off upon IBF=0 interrupt or timed
   out and retried again in the task context.

Remove this seperate and duplicate IBF=0 waiter.  By doing so we can
reduce the overall number of times to access the EC_SC(R) status
register.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=70891
Link: https://bugzilla.kernel.org/show_bug.cgi?id=63931
Link: https://bugzilla.kernel.org/show_bug.cgi?id=59911
Reported-and-tested-by: Gareth Williams <gareth@garethwilliams.me.uk>
Reported-and-tested-by: Hans de Goede <jwrdegoede@fedoraproject.org>
Reported-by: Barton Xu <tank.xuhan@gmail.com>
Tested-by: Steffen Weber <steffen.weber@gmail.com>
Tested-by: Arthur Chen <axchen@nvidia.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1 parent f92fca0
History
Tip revision: 9b80f0f73ae1583c22325ede341c74195847618c authored by Lv Zheng on 15 June 2014, 00:41:48 UTC
ACPI / EC: Remove duplicated ec_wait_ibf0() waiter
Tip revision: 9b80f0f
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