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authorSteve Wise <swise@opengridcomputing.com>2014-07-08 10:20:35 -0500
committerRoland Dreier <roland@purestorage.com>2014-07-08 16:56:55 -0700
commit6b54d54dea82ae214e4a45a503c4ef755a8ecee8 (patch)
tree825467589e899c43020f4295730742d8cbc9bbad /drivers/infiniband
parent5dab6d3ab1abed99be6166b844af58237d52a135 (diff)
downloadop-kernel-dev-6b54d54dea82ae214e4a45a503c4ef755a8ecee8.zip
op-kernel-dev-6b54d54dea82ae214e4a45a503c4ef755a8ecee8.tar.gz
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: 05eb23893c2c ("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>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/cxgb4/device.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index dd93aad..16b75de 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -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);
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