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[60.35.254.237]) by smtp.gmail.com with ESMTPSA id 194sm6227192pfz.182.2020.10.28.07.25.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Oct 2020 07:25:57 -0700 (PDT) From: Tsuchiya Yuto To: Amitkumar Karwar , Ganapathi Bhat , Xinming Hu , Kalle Valo , "David S. Miller" , Jakub Kicinski Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Maximilian Luz , Andy Shevchenko , verdre@v0yd.nl, Tsuchiya Yuto Subject: [PATCH 2/3] mwifiex: add allow_ps_mode module parameter Date: Wed, 28 Oct 2020 23:24:32 +0900 Message-Id: <20201028142433.18501-3-kitakar@gmail.com> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201028142433.18501-1-kitakar@gmail.com> References: <20201028142433.18501-1-kitakar@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org To make the ps_mode (power_save) control easier, this commit adds a new module parameter allow_ps_mode and set it false (disallowed) by default. When this parameter is set to false, changing the power_save mode will be disallowed like the following: $ sudo iw dev mlan0 set power_save on command failed: Operation not permitted (-1) Signed-off-by: Tsuchiya Yuto --- drivers/net/wireless/marvell/mwifiex/cfg80211.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c index a6b9dc6700b14..943bc1e8ceaee 100644 --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c @@ -25,6 +25,11 @@ static char *reg_alpha2; module_param(reg_alpha2, charp, 0); +static bool allow_ps_mode; +module_param(allow_ps_mode, bool, 0644); +MODULE_PARM_DESC(allow_ps_mode, + "allow WiFi power management to be enabled. (default: disallowed)"); + static const struct ieee80211_iface_limit mwifiex_ap_sta_limits[] = { { .max = MWIFIEX_MAX_BSS_NUM, @@ -435,6 +440,17 @@ mwifiex_cfg80211_set_power_mgmt(struct wiphy *wiphy, ps_mode = enabled; + /* Allow ps_mode to be enabled only when allow_ps_mode is true */ + if (ps_mode && !allow_ps_mode) { + mwifiex_dbg(priv->adapter, MSG, + "Enabling ps_mode disallowed by modparam\n"); + + /* Return -EPERM to inform userspace tools that setting + * power_save to be enabled is not permitted. + */ + return -EPERM; + } + return mwifiex_drv_set_power(priv, &ps_mode); }