linux-kernel - [PATCH] staging: r8188eu: Use flexible-array for one length array member

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Date:   Fri, 28 Oct 2022 18:26:42 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     outreachy@...ts.linux.dev,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Pavel Skripkin <paskripkin@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: r8188eu: Use flexible-array for one length array
 member

Flexible-array member should be used instead of one or zero member to
meet the need for having a dynamically sized trailing elements in a
structure. Refer to links [1] and [2] for detailed guidance on this
suggestion.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Issue identified using coccicheck.

Signed-off-by: Deepak R Varma <drv@...lo.com>
---
 drivers/staging/r8188eu/include/odm.h         | 2 +-
 drivers/staging/r8188eu/include/wlan_bssdef.h | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/r8188eu/include/odm.h b/drivers/staging/r8188eu/include/odm.h
index 89b01dd614ba..e2a9de5b9323 100644
--- a/drivers/staging/r8188eu/include/odm.h
+++ b/drivers/staging/r8188eu/include/odm.h
@@ -166,7 +166,7 @@ struct odm_ra_info {

 struct ijk_matrix_regs_set {
 	bool	bIQKDone;
-	s32	Value[1][IQK_Matrix_REG_NUM];
+	s32	Value[][IQK_Matrix_REG_NUM];
 };

 struct odm_rf_cal {
diff --git a/drivers/staging/r8188eu/include/wlan_bssdef.h b/drivers/staging/r8188eu/include/wlan_bssdef.h
index 831c465df500..33177de194eb 100644
--- a/drivers/staging/r8188eu/include/wlan_bssdef.h
+++ b/drivers/staging/r8188eu/include/wlan_bssdef.h
@@ -179,7 +179,7 @@ struct ndis_802_11_status_ind {

 struct ndis_802_11_auth_evt {
 	struct ndis_802_11_status_ind       Status;
-	struct ndis_802_11_auth_req  Request[1];
+	struct ndis_802_11_auth_req  Request[];
 };

 struct ndis_802_11_test {
@@ -291,7 +291,7 @@ struct pmkid_candidate {
 struct ndis_802_11_pmkid_list {
 	u32 Version;       /*  Version of the structure */
 	u32 NumCandidates; /*  No. of pmkid candidates */
-	struct pmkid_candidate CandidateList[1];
+	struct pmkid_candidate CandidateList[];
 };

 struct ndis_802_11_auth_encrypt {
@@ -304,7 +304,7 @@ struct ndis_802_11_cap {
 	u32  Version;
 	u32  NoOfPMKIDs;
 	u32  NoOfAuthEncryptPairsSupported;
-	struct ndis_802_11_auth_encrypt AuthenticationEncryptionSupported[1];
+	struct ndis_802_11_auth_encrypt AuthenticationEncryptionSupported[];
 };

 u8 key_2char2num(u8 hch, u8 lch);
--
2.34.1