From: Jack Morgenstein Date: Thu, 7 Mar 2013 03:46:53 +0000 (+0000) Subject: net/mlx4_core: Turn off device-managed FS bit in dev-cap wrapper if DMFS is not enabled X-Git-Tag: v3.9-rc3~36^2~24^2~4 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0081c8f3814a8344ca975c085d987ec6c90499ae;p=pandora-kernel.git net/mlx4_core: Turn off device-managed FS bit in dev-cap wrapper if DMFS is not enabled Older kernels detect DMFS (device-managed flow steering) from the HCA device capability directly, regardless of whether the capability was enabled in INIT_HCA, this is fixed by commit 7b8157bed "mlx4_core: Adjustments to Flow Steering activation logic for SR-IOV" To protect against guests running kernels without this fix, the host driver should turn off the DMFS capability bit in mlx4_QUERY_DEV_CAP_wrapper. Signed-off-by: Jack Morgenstein Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c index 50917eb3013e..f6245579962d 100644 --- a/drivers/net/ethernet/mellanox/mlx4/fw.c +++ b/drivers/net/ethernet/mellanox/mlx4/fw.c @@ -787,6 +787,14 @@ int mlx4_QUERY_DEV_CAP_wrapper(struct mlx4_dev *dev, int slave, bmme_flags &= ~MLX4_BMME_FLAG_TYPE_2_WIN; MLX4_PUT(outbox->buf, bmme_flags, QUERY_DEV_CAP_BMME_FLAGS_OFFSET); + /* turn off device-managed steering capability if not enabled */ + if (dev->caps.steering_mode != MLX4_STEERING_MODE_DEVICE_MANAGED) { + MLX4_GET(field, outbox->buf, + QUERY_DEV_CAP_FLOW_STEERING_RANGE_EN_OFFSET); + field &= 0x7f; + MLX4_PUT(outbox->buf, field, + QUERY_DEV_CAP_FLOW_STEERING_RANGE_EN_OFFSET); + } return 0; }