The "struct mana_cfg_rx_steer_req_v2" uses a dynamically sized set of trailing elements. Specifically, it uses a "mana_handle_t" array. So, use the preferred way in the kernel declaring a flexible array [1].
Also, avoid the open-coded arithmetic in the memory allocator functions [2] using the "struct_size" macro. Moreover, use the "offsetof" helper to get the indirect table offset instead of the "sizeof" operator and avoid the open-coded arithmetic in pointers using the new flex member. Now, it is also possible to use the "flex_array_size" helper to compute the size of these trailing elements in the "memcpy" function. Link: https://www.kernel.org/doc/html/next/process/deprecated.html#zero-length-and-one-element-arrays [1] Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [2] Signed-off-by: Erick Archer <[email protected]> --- drivers/infiniband/hw/mana/qp.c | 8 ++++---- drivers/net/ethernet/microsoft/mana/mana_en.c | 9 +++++---- include/net/mana/mana.h | 1 + 3 files changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/infiniband/hw/mana/qp.c b/drivers/infiniband/hw/mana/qp.c index 6e7627745c95..c2a39db8ef92 100644 --- a/drivers/infiniband/hw/mana/qp.c +++ b/drivers/infiniband/hw/mana/qp.c @@ -22,8 +22,7 @@ static int mana_ib_cfg_vport_steering(struct mana_ib_dev *dev, gc = mdev_to_gc(dev); - req_buf_size = - sizeof(*req) + sizeof(mana_handle_t) * MANA_INDIRECT_TABLE_SIZE; + req_buf_size = struct_size(req, indir_tab, MANA_INDIRECT_TABLE_SIZE); req = kzalloc(req_buf_size, GFP_KERNEL); if (!req) return -ENOMEM; @@ -44,11 +43,12 @@ static int mana_ib_cfg_vport_steering(struct mana_ib_dev *dev, req->rss_enable = true; req->num_indir_entries = MANA_INDIRECT_TABLE_SIZE; - req->indir_tab_offset = sizeof(*req); + req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, + indir_tab); req->update_indir_tab = true; req->cqe_coalescing_enable = 1; - req_indir_tab = (mana_handle_t *)(req + 1); + req_indir_tab = req->indir_tab; /* The ind table passed to the hardware must have * MANA_INDIRECT_TABLE_SIZE entries. Adjust the verb * ind_table to MANA_INDIRECT_TABLE_SIZE if required diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c index 59287c6e6cee..04aa096c6cc4 100644 --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -1062,7 +1062,7 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc, u32 req_buf_size; int err; - req_buf_size = sizeof(*req) + sizeof(mana_handle_t) * num_entries; + req_buf_size = struct_size(req, indir_tab, num_entries); req = kzalloc(req_buf_size, GFP_KERNEL); if (!req) return -ENOMEM; @@ -1074,7 +1074,8 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc, req->vport = apc->port_handle; req->num_indir_entries = num_entries; - req->indir_tab_offset = sizeof(*req); + req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2, + indir_tab); req->rx_enable = rx; req->rss_enable = apc->rss_state; req->update_default_rxobj = update_default_rxobj; @@ -1087,9 +1088,9 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc, memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE); if (update_tab) { - req_indir_tab = (mana_handle_t *)(req + 1); + req_indir_tab = req->indir_tab; memcpy(req_indir_tab, apc->rxobj_table, - req->num_indir_entries * sizeof(mana_handle_t)); + flex_array_size(req, indir_tab, req->num_indir_entries)); } err = mana_send_request(apc->ac, req, req_buf_size, &resp, diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index 76147feb0d10..20ffcae29e1e 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -671,6 +671,7 @@ struct mana_cfg_rx_steer_req_v2 { u8 hashkey[MANA_HASH_KEY_SIZE]; u8 cqe_coalescing_enable; u8 reserved2[7]; + mana_handle_t indir_tab[]; }; /* HW DATA */ struct mana_cfg_rx_steer_resp { -- 2.25.1
