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iw_cxgb4: Atomically flush per QP HW CQEs

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commit 2df19e19ae upstream.

When a CQ is shared by multiple QPs, c4iw_flush_hw_cq() needs to acquire
corresponding QP lock before moving the CQEs into its corresponding SW
queue and accessing the SQ contents for completing a WR.
Ignore CQEs if corresponding QP is already flushed.

Cc: stable@vger.kernel.org
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bharat Potnuri 2018-04-27 16:41:16 +05:30 • committed by Greg Kroah-Hartman
commit 758f3340b8
3 changed files with 13 additions and 4 deletions
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