From 8a7ff14dcb40bade309cd2ad04c746bb1d169c4e Mon Sep 17 00:00:00 2001 From: Matan Barak Date: Wed, 1 Jul 2015 14:31:02 +0300 Subject: [PATCH] IB/mlx4: Do not attemp to report HCA clock offset on VFs mlx4 VFs can provide CQE raw time-stamping services, but they don't have the hca core clock mapped to their PCI bars. As such, we should not attempt to query and report the clock offset to user space for VFs. Doing so causes query_device over VFs to fail with -ENOSUPP. Fixes: 4b664c4355b2 ('IB/mlx4: Add support for CQ time-stamping') Signed-off-by: Matan Barak Signed-off-by: Or Gerlitz Signed-off-by: Doug Ledford --- drivers/infiniband/hw/mlx4/main.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 067a691ecbed..f419a728a22b 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -253,14 +253,15 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, props->hca_core_clock = dev->dev->caps.hca_core_clock * 1000UL; props->timestamp_mask = 0xFFFFFFFFFFFFULL; - err = mlx4_get_internal_clock_params(dev->dev, &clock_params); - if (err) - goto out; + if (!mlx4_is_slave(dev->dev)) + err = mlx4_get_internal_clock_params(dev->dev, &clock_params); if (uhw->outlen >= resp.response_length + sizeof(resp.hca_core_clock_offset)) { - resp.hca_core_clock_offset = clock_params.offset % PAGE_SIZE; resp.response_length += sizeof(resp.hca_core_clock_offset); - resp.comp_mask |= QUERY_DEVICE_RESP_MASK_TIMESTAMP; + if (!err && !mlx4_is_slave(dev->dev)) { + resp.comp_mask |= QUERY_DEVICE_RESP_MASK_TIMESTAMP; + resp.hca_core_clock_offset = clock_params.offset % PAGE_SIZE; + } } if (uhw->outlen) { -- 2.39.2