[PATCH 3.16 083/370] iw_cxgb4: Fix error return code in c4iw_rdev_open()

[Ben Hutchings]

3.16.42-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Yongjun <weiyongj...@huawei.com>

commit 15f7e3c21b76598bc6e5816d2577ce843b2b963f upstream.

Fix to return error code -ENOMEM from the __get_free_page() error
handling case instead of 0, as done elsewhere in this function.

Fixes: 05eb23893c2c ("cxgb4/iw_cxgb4: Doorbell Drop Avoidance Bug Fixes")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
Acked-by: Steve Wise <sw...@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledf...@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -694,6 +694,7 @@ static int c4iw_rdev_open(struct c4iw_rd
                            __get_free_page(GFP_KERNEL);
        if (!rdev->status_page) {
                pr_err(MOD "error allocating status page\n");
+               err = -ENOMEM;
                goto err4;
        }
        rdev->status_page->db_off = 0;