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RDMA/cxgb4: Initialize the device status page 

The status page is mapped to user processes and allows sharing the
device state between the kernel and user processes.  This state isn't
getting initialized and thus intermittently causes problems.  Namely,
the user process can mistakenly think the user doorbell writes are
disabled which causes SQ work requests to never get fetched by HW.

Fixes: 05eb23893c ("cxgb4/iw_cxgb4: Doorbell Drop Avoidance Bug Fixes").
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Cc: <stable@vger.kernel.org> # v3.15
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Steve Wise 2014-07-08 10:20:35 -05:00 committed by Roland Dreier
parent 5dab6d3ab1
commit 6b54d54dea
1 changed files with 1 additions and 0 deletions
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1
drivers/infiniband/hw/cxgb4/device.c
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@ -696,6 +696,7 @@ static int c4iw_rdev_open(struct c4iw_rdev *rdev)
pr_err(MOD "error allocating status page\n");
goto err4;
}
rdev->status_page->db_off = 0;
return 0;
err4:
c4iw_rqtpool_destroy(rdev);