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ath6kl: wmi: use struct_size() helper

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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.

So, replace code of the following form:

sizeof(*ev) + ev->num_neighbors * sizeof(struct wmi_neighbor_info)

with:

struct_size(ev, neighbor, ev->num_neighbors)

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Gustavo A. R. Silva 2019-04-03 13:49:49 -05:00 committed by Kalle Valo
parent df75786b92
commit 83d9562b64
1 changed files with 1 additions and 2 deletions
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3
drivers/net/wireless/ath/ath6kl/wmi.c
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@ -1295,8 +1295,7 @@ static int ath6kl_wmi_neighbor_report_event_rx(struct wmi *wmi, u8 *datap,
if (len < sizeof(*ev))
return -EINVAL;
ev = (struct wmi_neighbor_report_event *) datap;
if (sizeof(*ev) + ev->num_neighbors * sizeof(struct wmi_neighbor_info)
> len) {
if (struct_size(ev, neighbor, ev->num_neighbors) > len) {
ath6kl_dbg(ATH6KL_DBG_WMI,
"truncated neighbor event (num=%d len=%d)\n",
ev->num_neighbors, len);