linux-kernel - [PATCH] wifi: mwifiex: keep mwifiex_cfg80211

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Message-Id: <20240809-mwifiex-duplicate-mwifiex_cfg80211_ops-v1-1-23e0e6290ace@pengutronix.de>
Date: Fri, 09 Aug 2024 11:51:48 +0200
From: Sascha Hauer <s.hauer@...gutronix.de>
To: Brian Norris <briannorris@...omium.org>, 
 Francesco Dolcini <francesco@...cini.it>, Kalle Valo <kvalo@...nel.org>, 
 David Lin <yu-hao.lin@....com>
Cc: linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kernel@...gutronix.de, Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH] wifi: mwifiex: keep mwifiex_cfg80211_ops constant

With host_mlme support being added mwifiex_cfg80211_ops is no longer
constant, but supplemented with the host_mlme related ops when host_mlme
support is enabled. This doesn't work with multiple adapters when only
few of then have host_mlme support. Duplicate mwifiex_cfg80211_ops
before using it and keep the original constant.

While at it mark mwifiex_cfg80211_ops const to prevent people from
changing it again during runtime.

Fixes: 36995892c271c ("wifi: mwifiex: add host mlme for client mode")
Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
Kalle, the commit breaking it still sits in wireless-next. Feel free to
squash this into the original commit if convenient for you.
---
 drivers/net/wireless/marvell/mwifiex/cfg80211.c | 26 ++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index 722ead51e9123..e36ef075fe053 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -4570,7 +4570,7 @@ mwifiex_cfg80211_probe_client(struct wiphy *wiphy,
 }
 
 /* station cfg80211 operations */
-static struct cfg80211_ops mwifiex_cfg80211_ops = {
+static const struct cfg80211_ops mwifiex_cfg80211_ops = {
 	.add_virtual_intf = mwifiex_add_virtual_intf,
 	.del_virtual_intf = mwifiex_del_virtual_intf,
 	.change_virtual_intf = mwifiex_cfg80211_change_virtual_intf,
@@ -4705,24 +4705,28 @@ int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
 	struct mwifiex_private *priv = adapter->priv[MWIFIEX_BSS_TYPE_STA];
 	u8 *country_code;
 	u32 thr, retry;
+	struct cfg80211_ops *ops;
+
+	ops = devm_kmemdup(adapter->dev, &mwifiex_cfg80211_ops,
+			   sizeof(mwifiex_cfg80211_ops), GFP_KERNEL);
+	if (!ops)
+		return -ENOMEM;
 
 	/* create a new wiphy for use with cfg80211 */
-	wiphy = wiphy_new(&mwifiex_cfg80211_ops,
-			  sizeof(struct mwifiex_adapter *));
+	wiphy = wiphy_new(ops, sizeof(struct mwifiex_adapter *));
 	if (!wiphy) {
 		mwifiex_dbg(adapter, ERROR,
 			    "%s: creating new wiphy\n", __func__);
 		return -ENOMEM;
 	}
 	if (adapter->host_mlme_enabled) {
-		mwifiex_cfg80211_ops.auth = mwifiex_cfg80211_authenticate;
-		mwifiex_cfg80211_ops.assoc = mwifiex_cfg80211_associate;
-		mwifiex_cfg80211_ops.deauth = mwifiex_cfg80211_deauthenticate;
-		mwifiex_cfg80211_ops.disassoc = mwifiex_cfg80211_disassociate;
-		mwifiex_cfg80211_ops.disconnect = NULL;
-		mwifiex_cfg80211_ops.connect = NULL;
-		mwifiex_cfg80211_ops.probe_client =
-			mwifiex_cfg80211_probe_client;
+		ops->auth = mwifiex_cfg80211_authenticate;
+		ops->assoc = mwifiex_cfg80211_associate;
+		ops->deauth = mwifiex_cfg80211_deauthenticate;
+		ops->disassoc = mwifiex_cfg80211_disassociate;
+		ops->disconnect = NULL;
+		ops->connect = NULL;
+		ops->probe_client = mwifiex_cfg80211_probe_client;
 	}
 	wiphy->max_scan_ssids = MWIFIEX_MAX_SSID_LIST_LENGTH;
 	wiphy->max_scan_ie_len = MWIFIEX_MAX_VSIE_LEN;

---
base-commit: 4ab9f870a6335af27507d1f3bfb29635d956af48
change-id: 20240809-mwifiex-duplicate-mwifiex_cfg80211_ops-3700e6838ec3

Best regards,
-- 
Sascha Hauer <s.hauer@...gutronix.de>