From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCD8A3B2FD9; Sat, 17 Oct 2026 16:48:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792255717; cv=none; b=fkKz6THZr31y0vyv+aJvhKA+MB60V9Rtr4rV/o5lq7bDYe0OlSGclV/RQIzPoLpiwl0fmBfELD1YfJ1lgmRko+JzU1iBaIUIiiE4aakyH/NnZG0qBilhZ5LIfR4XtmkzwIQCLZVs2YMRqrmRNm+WO9rtbJoCeJqov6UQnipRScE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792255717; c=relaxed/simple; bh=Texg7uaqxvJS5/5KvPN7t3EWcfobNEIMxWj4V0LcRHU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=o6Mzj1VTvlCnmZtpaVaFwr7W+HshsY2lTbmnLL9xx9aTHl2BIv+BhoA+RIPQyklxKSsb57qHxSgTiJarbl+BOafW9RnIHVrTDboTsMF33hO7H1mQEDpWZA9TbbzkHeK65g/7glu/HbIv1n7upXUofiDRv7+5r3/fMGgqhRUvXEo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wuGVbbDk; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="wuGVbbDk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 06A1E1F000C4; Sat, 17 Oct 2026 16:48:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792255716; bh=6XVSDSzMLR8l/SRljHcuur6vVCZjyQ+n+wEe9eFSk/E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=wuGVbbDklNBGMZ6M7h5iUKGxE8ulcb29XCx9nIkEtDHDTZnZpFssO/C35rZshjtmT ra82kLwnWjAl6YhQQyCapHrTXpPkX33xJt55+gL0d49516or3N8/vAyPWamnkrTu+s yLjDace26XsAjHUzyjIe8G9htMUpPjaQJvDE9bUw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mehmet Fide , =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= , Linus Torvalds , Sasha Levin Subject: [PATCH 6.12 867/869] wifi: atk9k: Revert "wifi: ath9k: reject short WMI command responses" Date: Sat, 17 Oct 2026 18:01:48 +0200 Message-ID: <20261017160059.085705078@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160036.979869304@linuxfoundation.org> References: <20261017160036.979869304@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Toke Høiland-Jørgensen [ Upstream commit 90201351a862182bdabfc1ad1c97b1e1b6ed5931 ] This reverts commit 93ce8ea70451e800601bc9444aa33043de15d67b. Mehmet reported that the offending commit breaks his AR9271 USB adapter which uses zero-length replies to commands that don't return a value. Revert the whole thing to restore the functionality. Cc: stable@vger.kernel.org # the offending commit is in 6.12.113 Reported-by: Mehmet Fide Signed-off-by: Toke Høiland-Jørgensen Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath9k/wmi.c | 16 ++-------------- drivers/net/wireless/ath/ath9k/wmi.h | 1 - 2 files changed, 2 insertions(+), 15 deletions(-) --- a/drivers/net/wireless/ath/ath9k/wmi.c +++ b/drivers/net/wireless/ath/ath9k/wmi.c @@ -206,16 +206,9 @@ static void ath9k_wmi_rsp_callback(struc { skb_pull(skb, sizeof(struct wmi_cmd_hdr)); - if (wmi->cmd_rsp_buf && wmi->cmd_rsp_len) { - if (skb->len < wmi->cmd_rsp_len) { - wmi->cmd_rsp_status = -EMSGSIZE; - goto complete; - } + if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0) memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len); - } - wmi->cmd_rsp_status = 0; -complete: complete(&wmi->cmd_wait); } @@ -307,7 +300,6 @@ static int ath9k_wmi_cmd_issue(struct wm /* record the rsp buffer and length */ wmi->cmd_rsp_buf = rsp_buf; wmi->cmd_rsp_len = rsp_len; - wmi->cmd_rsp_status = 0; wmi->last_seq_id = wmi->tx_seq_id; spin_unlock_irqrestore(&wmi->wmi_lock, flags); @@ -364,13 +356,9 @@ int ath9k_wmi_cmd(struct wmi *wmi, enum return -ETIMEDOUT; } - spin_lock_irqsave(&wmi->wmi_lock, flags); - ret = wmi->cmd_rsp_status; - spin_unlock_irqrestore(&wmi->wmi_lock, flags); - mutex_unlock(&wmi->op_mutex); - return ret; + return 0; out: ath_dbg(common, WMI, "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id)); --- a/drivers/net/wireless/ath/ath9k/wmi.h +++ b/drivers/net/wireless/ath/ath9k/wmi.h @@ -157,7 +157,6 @@ struct wmi { u16 tx_seq_id; u8 *cmd_rsp_buf; u32 cmd_rsp_len; - int cmd_rsp_status; bool stopped; struct list_head pending_tx_events;