https://github.com/torvalds/linux
Revision 34c7bb4705a0a2d344b0c82eaf3d3bfa2bc9da45 authored by Sudarsana Reddy Kalluru on 28 June 2016, 11:46:03 UTC, committed by David S. Miller on 29 June 2016, 12:12:45 UTC
SPQ doorbell is currently protected with the compilation barrier. Under the
stress scenarios, we may get into a state where (due to the weak ordering)
several ramrod doorbells were written to the BAR with an out-of-order
producer values. Need to change the barrier type to a write barrier to make
sure that the write buffer is flushed after each doorbell.

Signed-off-by: Sudarsana Reddy Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent b560f03
History
Tip revision: 34c7bb4705a0a2d344b0c82eaf3d3bfa2bc9da45 authored by Sudarsana Reddy Kalluru on 28 June 2016, 11:46:03 UTC
qed: Protect the doorbell BAR with the write barriers.
Tip revision: 34c7bb4
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