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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Junyang Han , =?UTF-8?q?Stefan=20D=C3=B6singer?= , Felix Fietkau , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-wireless@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH net-next 5/5] net: ethernet: zte: zx279128s: debugfs knobs for the WLAN ring Date: Wed, 11 Nov 2026 15:44:26 +0100 Message-Id: <20261111144426.1321237-6-isasmendi.agus@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20261111144426.1321237-1-isasmendi.agus@gmail.com> References: <20261111144426.1321237-1-isasmendi.agus@gmail.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261111_064441_952372_894F8A6D X-CRM114-Status: GOOD ( 14.21 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 wlan_state (counters and port table), wlan_inject_all (inject every frame of the bound interfaces, as the vendor firmware does, to exercise the ring and the trap path without flows) and wlan_bind (bind an interface by name). Testing aids, kept apart so they can be dropped. Assisted-by: LLM Signed-off-by: Agustin Santiago Isasmendi --- drivers/net/ethernet/zte/zx279128s-wlan.c | 34 +++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/net/ethernet/zte/zx279128s-wlan.c b/drivers/net/ethernet/zte/zx279128s-wlan.c index 6c6f6a36d34f..29970db47a41 100644 --- a/drivers/net/ethernet/zte/zx279128s-wlan.c +++ b/drivers/net/ethernet/zte/zx279128s-wlan.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -751,6 +752,38 @@ static int zx_wlan_state_show(struct seq_file *s, void *data) return 0; } +/* Bind an interface by name without waiting for a flow (testing) */ +static ssize_t zx_wlan_bind_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct zx_eth_adapter *adapter = file->private_data; + char name[IFNAMSIZ + 1]; + struct net_device *vif; + int ret; + + if (count == 0 || count > IFNAMSIZ) + return -EINVAL; + if (copy_from_user(name, ubuf, count)) + return -EFAULT; + name[count] = 0; + strim(name); + vif = dev_get_by_name(dev_net(adapter->wlan->napi.dev), name); + if (!vif) + return -ENODEV; + mutex_lock(&adapter->ppe_lock); + ret = zx_wlan_is_ap(vif) ? zx_wlan_port_get(adapter->wlan, vif) : -EINVAL; + mutex_unlock(&adapter->ppe_lock); + dev_put(vif); + return ret < 0 ? ret : count; +} + +static const struct file_operations zx_wlan_bind_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = zx_wlan_bind_write, + .llseek = noop_llseek, +}; + void zx_wlan_debugfs_init(struct zx_eth_adapter *adapter, struct dentry *dir) { if (!adapter->wlan) @@ -759,6 +792,7 @@ void zx_wlan_debugfs_init(struct zx_eth_adapter *adapter, struct dentry *dir) zx_wlan_state_show); debugfs_create_bool("wlan_inject_all", 0600, dir, &adapter->wlan->inject_all); + debugfs_create_file("wlan_bind", 0200, dir, adapter, &zx_wlan_bind_fops); } /* ---- init / fini --------------------------------------------------- */ -- 2.30.2