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[v2,1/6,next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_begin_scan_cmd

Message ID 1ef801ea24475501fa0f296cb5435a440135206e.1645736204.git.gustavoars@kernel.org (mailing list archive)
State Accepted
Commit 324edddf2505a240a9226735dbbf3d5dc2b4a24d
Delegated to: Kalle Valo
Headers show
Series ath6kl: wmi: Replace one-element arrays with flexible-array members | expand

Commit Message

Gustavo A. R. Silva Feb. 24, 2022, 9:15 p.m. UTC 
Replace one-element array with flexible-array member in struct
wmi_begin_scan_cmd. Also, make use of the struct_size() helper.

This issue was found with the help of Coccinelle and audited and fixed,
manually.

Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/79
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
Changes in v2:
 - Add Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com> tag.

 drivers/net/wireless/ath/ath6kl/wmi.c | 9 ++-------
 drivers/net/wireless/ath/ath6kl/wmi.h | 2 +-
 2 files changed, 3 insertions(+), 8 deletions(-)

Comments

Kalle Valo March 9, 2022, 3:08 p.m. UTC | #1 
"Gustavo A. R. Silva" <gustavoars@kernel.org> wrote:

> Replace one-element array with flexible-array member in struct
> wmi_begin_scan_cmd. Also, make use of the struct_size() helper.
> 
> This issue was found with the help of Coccinelle and audited and fixed,
> manually.
> 
> Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
> Link: https://github.com/KSPP/linux/issues/79
> Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

6 patches applied to ath-next branch of ath.git, thanks.

324edddf2505 ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_begin_scan_cmd
56f1257fdcc0 ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_start_scan_cmd
3c5e6994eea3 ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_channel_list_reply
dfb0203939b1 ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_connect_event
5140df50e655 ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_disconnect_event
0dff6f05a9dc ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_aplist_event
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index bd1ef6334997..e1c950014f3e 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -2008,7 +2008,7 @@  int ath6kl_wmi_beginscan_cmd(struct wmi *wmi, u8 if_idx,
 	struct ieee80211_supported_band *sband;
 	struct sk_buff *skb;
 	struct wmi_begin_scan_cmd *sc;
-	s8 size, *supp_rates;
+	s8 *supp_rates;
 	int i, band, ret;
 	struct ath6kl *ar = wmi->parent_dev;
 	int num_rates;
@@ -2023,18 +2023,13 @@  int ath6kl_wmi_beginscan_cmd(struct wmi *wmi, u8 if_idx,
 						num_chan, ch_list);
 	}
 
-	size = sizeof(struct wmi_begin_scan_cmd);
-
 	if ((scan_type != WMI_LONG_SCAN) && (scan_type != WMI_SHORT_SCAN))
 		return -EINVAL;
 
 	if (num_chan > WMI_MAX_CHANNELS)
 		return -EINVAL;
 
-	if (num_chan)
-		size += sizeof(u16) * (num_chan - 1);
-
-	skb = ath6kl_wmi_get_new_buf(size);
+	skb = ath6kl_wmi_get_new_buf(struct_size(sc, ch_list, num_chan));
 	if (!skb)
 		return -ENOMEM;
 
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 784940ba4c90..322539ed9c12 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -863,7 +863,7 @@  struct wmi_begin_scan_cmd {
 	u8 num_ch;
 
 	/* channels in Mhz */
-	__le16 ch_list[1];
+	__le16 ch_list[];
 } __packed;
 
 /* wmi_start_scan_cmd is to be deprecated. Use