There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use "flexible array members"[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. Also, refactor the code a bit to make use of the struct_size() helper in kzalloc(). [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.14/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by: Len Baker <len.baker@xxxxxxx> --- drivers/net/wireless/ath/ath11k/reg.c | 7 ++----- drivers/net/wireless/ath/ath11k/wmi.h | 2 +- 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/reg.c b/drivers/net/wireless/ath/ath11k/reg.c index e1a1df169034..c83d265185f1 100644 --- a/drivers/net/wireless/ath/ath11k/reg.c +++ b/drivers/net/wireless/ath/ath11k/reg.c @@ -97,7 +97,6 @@ int ath11k_reg_update_chan_list(struct ath11k *ar) struct channel_param *ch; enum nl80211_band band; int num_channels = 0; - int params_len; int i, ret; bands = hw->wiphy->bands; @@ -117,10 +116,8 @@ int ath11k_reg_update_chan_list(struct ath11k *ar) if (WARN_ON(!num_channels)) return -EINVAL; - params_len = sizeof(struct scan_chan_list_params) + - num_channels * sizeof(struct channel_param); - params = kzalloc(params_len, GFP_KERNEL); - + params = kzalloc(struct_size(params, ch_param, num_channels), + GFP_KERNEL); if (!params) return -ENOMEM; diff --git a/drivers/net/wireless/ath/ath11k/wmi.h b/drivers/net/wireless/ath/ath11k/wmi.h index d35c47e0b19d..d9c83726f65d 100644 --- a/drivers/net/wireless/ath/ath11k/wmi.h +++ b/drivers/net/wireless/ath/ath11k/wmi.h @@ -3608,7 +3608,7 @@ struct wmi_stop_scan_cmd { struct scan_chan_list_params { u32 pdev_id; u16 nallchans; - struct channel_param ch_param[1]; + struct channel_param ch_param[]; }; struct wmi_scan_chan_list_cmd { -- 2.25.1
