From: Gustavo A. R. Silva Date: Tue, 16 Jun 2020 22:51:32 +0000 (-0500) Subject: ath10k: wmi: Use struct_size() helper in ath10k_wmi_alloc_skb() X-Git-Tag: v5.10.7~1401^2~309^2^2~25 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e96eecdb290af89e3aca05df835d6123c8947bee;p=platform%2Fkernel%2Flinux-rpi.git ath10k: wmi: Use struct_size() helper in ath10k_wmi_alloc_skb() Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. Also, remove unnecessary variable _len_. This code was detected with the help of Coccinelle and, audited and fixed manually. Signed-off-by: Gustavo A. R. Silva Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200616225132.GA19873@embeddedor --- diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 7f59c93..acc0cd3 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -6552,7 +6552,7 @@ static struct sk_buff *ath10k_wmi_op_gen_init(struct ath10k *ar) struct wmi_init_cmd *cmd; struct sk_buff *buf; struct wmi_resource_config config = {}; - u32 len, val; + u32 val; config.num_vdevs = __cpu_to_le32(TARGET_NUM_VDEVS); config.num_peers = __cpu_to_le32(TARGET_NUM_PEERS); @@ -6604,10 +6604,8 @@ static struct sk_buff *ath10k_wmi_op_gen_init(struct ath10k *ar) config.num_msdu_desc = __cpu_to_le32(TARGET_NUM_MSDU_DESC); config.max_frag_entries = __cpu_to_le32(TARGET_MAX_FRAG_ENTRIES); - len = sizeof(*cmd) + - (sizeof(struct host_memory_chunk) * ar->wmi.num_mem_chunks); - - buf = ath10k_wmi_alloc_skb(ar, len); + buf = ath10k_wmi_alloc_skb(ar, struct_size(cmd, mem_chunks.items, + ar->wmi.num_mem_chunks)); if (!buf) return ERR_PTR(-ENOMEM); @@ -6625,7 +6623,7 @@ static struct sk_buff *ath10k_wmi_10_1_op_gen_init(struct ath10k *ar) struct wmi_init_cmd_10x *cmd; struct sk_buff *buf; struct wmi_resource_config_10x config = {}; - u32 len, val; + u32 val; config.num_vdevs = __cpu_to_le32(TARGET_10X_NUM_VDEVS); config.num_peers = __cpu_to_le32(TARGET_10X_NUM_PEERS); @@ -6669,10 +6667,8 @@ static struct sk_buff *ath10k_wmi_10_1_op_gen_init(struct ath10k *ar) config.num_msdu_desc = __cpu_to_le32(TARGET_10X_NUM_MSDU_DESC); config.max_frag_entries = __cpu_to_le32(TARGET_10X_MAX_FRAG_ENTRIES); - len = sizeof(*cmd) + - (sizeof(struct host_memory_chunk) * ar->wmi.num_mem_chunks); - - buf = ath10k_wmi_alloc_skb(ar, len); + buf = ath10k_wmi_alloc_skb(ar, struct_size(cmd, mem_chunks.items, + ar->wmi.num_mem_chunks)); if (!buf) return ERR_PTR(-ENOMEM); @@ -6690,7 +6686,7 @@ static struct sk_buff *ath10k_wmi_10_2_op_gen_init(struct ath10k *ar) struct wmi_init_cmd_10_2 *cmd; struct sk_buff *buf; struct wmi_resource_config_10x config = {}; - u32 len, val, features; + u32 val, features; config.num_vdevs = __cpu_to_le32(TARGET_10X_NUM_VDEVS); config.num_peer_keys = __cpu_to_le32(TARGET_10X_NUM_PEER_KEYS); @@ -6742,10 +6738,8 @@ static struct sk_buff *ath10k_wmi_10_2_op_gen_init(struct ath10k *ar) config.num_msdu_desc = __cpu_to_le32(TARGET_10X_NUM_MSDU_DESC); config.max_frag_entries = __cpu_to_le32(TARGET_10X_MAX_FRAG_ENTRIES); - len = sizeof(*cmd) + - (sizeof(struct host_memory_chunk) * ar->wmi.num_mem_chunks); - - buf = ath10k_wmi_alloc_skb(ar, len); + buf = ath10k_wmi_alloc_skb(ar, struct_size(cmd, mem_chunks.items, + ar->wmi.num_mem_chunks)); if (!buf) return ERR_PTR(-ENOMEM); @@ -6777,7 +6771,6 @@ static struct sk_buff *ath10k_wmi_10_4_op_gen_init(struct ath10k *ar) struct wmi_init_cmd_10_4 *cmd; struct sk_buff *buf; struct wmi_resource_config_10_4 config = {}; - u32 len; config.num_vdevs = __cpu_to_le32(ar->max_num_vdevs); config.num_peers = __cpu_to_le32(ar->max_num_peers); @@ -6839,10 +6832,8 @@ static struct sk_buff *ath10k_wmi_10_4_op_gen_init(struct ath10k *ar) config.iphdr_pad_config = __cpu_to_le32(TARGET_10_4_IPHDR_PAD_CONFIG); config.qwrap_config = __cpu_to_le32(TARGET_10_4_QWRAP_CONFIG); - len = sizeof(*cmd) + - (sizeof(struct host_memory_chunk) * ar->wmi.num_mem_chunks); - - buf = ath10k_wmi_alloc_skb(ar, len); + buf = ath10k_wmi_alloc_skb(ar, struct_size(cmd, mem_chunks.items, + ar->wmi.num_mem_chunks)); if (!buf) return ERR_PTR(-ENOMEM); @@ -7550,12 +7541,9 @@ ath10k_wmi_op_gen_scan_chan_list(struct ath10k *ar, struct sk_buff *skb; struct wmi_channel_arg *ch; struct wmi_channel *ci; - int len; int i; - len = sizeof(*cmd) + arg->n_channels * sizeof(struct wmi_channel); - - skb = ath10k_wmi_alloc_skb(ar, len); + skb = ath10k_wmi_alloc_skb(ar, struct_size(cmd, chan_info, arg->n_channels)); if (!skb) return ERR_PTR(-EINVAL);