There is already a patch for this: https://lore.kernel.org/lkml/20210823172159.GA25800@embeddedor/ which I will now add to my -next tree. Thanks -- Gustavo On Sat, Sep 04, 2021 at 01:49:37PM +0200, Len Baker wrote: > 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 >
