From: Jack Morgenstein Date: Thu, 30 Jul 2015 14:34:23 +0000 (+0300) Subject: IB/mlx4: Forbid using sysfs to change RoCE pkeys X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2b135db3e81301d0452e6aa107349abe67b097d6;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git IB/mlx4: Forbid using sysfs to change RoCE pkeys The pkey mapping for RoCE must remain the default mapping: VFs: virtual index 0 = mapped to real index 0 (0xFFFF) All others indices: mapped to a real pkey index containing an invalid pkey. PF: virtual index i = real index i. Don't allow users to change these mappings using files found in sysfs. Fixes: c1e7e466120b ('IB/mlx4: Add iov directory in sysfs under the ib device') Signed-off-by: Jack Morgenstein Signed-off-by: Or Gerlitz Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/hw/mlx4/sysfs.c b/drivers/infiniband/hw/mlx4/sysfs.c index 6797108ce873..69fb5ba94d0f 100644 --- a/drivers/infiniband/hw/mlx4/sysfs.c +++ b/drivers/infiniband/hw/mlx4/sysfs.c @@ -640,6 +640,8 @@ static int add_port(struct mlx4_ib_dev *dev, int port_num, int slave) struct mlx4_port *p; int i; int ret; + int is_eth = rdma_port_get_link_layer(&dev->ib_dev, port_num) == + IB_LINK_LAYER_ETHERNET; p = kzalloc(sizeof *p, GFP_KERNEL); if (!p) @@ -657,7 +659,8 @@ static int add_port(struct mlx4_ib_dev *dev, int port_num, int slave) p->pkey_group.name = "pkey_idx"; p->pkey_group.attrs = - alloc_group_attrs(show_port_pkey, store_port_pkey, + alloc_group_attrs(show_port_pkey, + is_eth ? NULL : store_port_pkey, dev->dev->caps.pkey_table_len[port_num]); if (!p->pkey_group.attrs) { ret = -ENOMEM;