RDMA/qedr: Fix wmb usage in qedr

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This patch comes as a result of Sinan Kaya's work and the decision that
writel() must be a strong enough barrier for DMA.

wmb usages in qedr driver have either been removed where they were there
only to order DMA accesses, and replaced with smp_wmb and comments for the
places that the barrier was there for SMP reasons.

Fixes: 561e5d4896 ("RDMA/qedr: eliminate duplicate barriers on weakly-ordered archs")
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Kalderon, Michal 2018-04-05 09:59:29 +03:00 • committed by Jason Gunthorpe

parent 39e00b6cf6

commit 09c4854fde

1 changed files with 18 additions and 8 deletions

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26

drivers/infiniband/hw/qedr/verbs.c

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