IB/ipath: Add barrier before updating WC head in shared memory

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Add a barrier to make sure the CPU doesn't reorder writes to memory,
since user programs can be polling on the head index update and the
entry should be written before that.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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Ralph Campbell 2007-07-06 12:48:23 -07:00 • committed by Roland Dreier

parent 06cc85086e

commit 4fc570bcbe

5 changed files with 12 additions and 1 deletions

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5

drivers/infiniband/hw/ipath/ipath_cq.c

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2

drivers/infiniband/hw/ipath/ipath_ruc.c

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2

drivers/infiniband/hw/ipath/ipath_srq.c

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2

drivers/infiniband/hw/ipath/ipath_ud.c

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2

drivers/infiniband/hw/ipath/ipath_verbs.c

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