From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 460622C11CA; Thu, 15 Jan 2026 17:14:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497267; cv=none; b=st0f6fKevheBkgPuyE/VtZ3iSVqg6HQ2WX5/lMRiiC9ZG/LqeYWGjFP/pUPB9YQXDR8kmBRZFcags/ZPEdUSxvEz6BobbAzS9u/g/CMGWEwgcYi8L7hSP4hPLqYwl7dI3WBGHLP5/PcAb2PrjyJdLY9SSEk3RA4MSL9kZfB8UzY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497267; c=relaxed/simple; bh=re0Jnwfe68xfRL5UO4jJ3Xgzd2dnZGISN/LV8SJFwPA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tx+eOMAhTT68nWflQGWcciUc3rIO8AzDG49bBVWEHzlgM0BVj8HAxrIJK4u15eOVXsV/gQfcA9Rv1myV3rfrMqKql/8SGl4riO1GB//kYUVGOKsziS2fSOma7Lp+YBrMsvgFc/2kKNHjXijHx0Z0n/ostewVu7gZ1/bWSs1KFf0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=b32i+sV1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="b32i+sV1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7FD5FC116D0; Thu, 15 Jan 2026 17:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768497266; bh=re0Jnwfe68xfRL5UO4jJ3Xgzd2dnZGISN/LV8SJFwPA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b32i+sV1JRbzTPuyE6i/rZpvE8QQRwTgT9dFYlSKb5hO9GoPy/60cOur6dYaFn9W+ QP6VsEUdO7Bu8kML5Sl+GRoKoHoD5VKfbvAh6YlTJXIfttCxZ3PydvNBtq7EJOlzJW DcNkZG1OdWtfpICSTmtU8CqcUuAyZ8GPy9jLHw3I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold Subject: [PATCH 5.15 021/554] USB: serial: kobil_sct: fix TIOCMBIS and TIOCMBIC Date: Thu, 15 Jan 2026 17:41:27 +0100 Message-ID: <20260115164247.008817509@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit d432df758f92c4c28aac409bc807fd1716167577 upstream. Asserting or deasserting a modem control line using TIOCMBIS or TIOCMBIC should not deassert any lines that are not in the mask. Fix this long-standing issue dating back to 2003 when the support for these ioctls was added with the introduction of the tiocmset() callback. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/kobil_sct.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) --- a/drivers/usb/serial/kobil_sct.c +++ b/drivers/usb/serial/kobil_sct.c @@ -419,7 +419,7 @@ static int kobil_tiocmset(struct tty_str struct usb_serial_port *port = tty->driver_data; struct device *dev = &port->dev; struct kobil_private *priv; - int result; + int result = 0; int dtr = 0; int rts = 0; @@ -436,12 +436,12 @@ static int kobil_tiocmset(struct tty_str if (set & TIOCM_DTR) dtr = 1; if (clear & TIOCM_RTS) - rts = 0; + rts = 1; if (clear & TIOCM_DTR) - dtr = 0; + dtr = 1; - if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) { - if (dtr != 0) + if (dtr && priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) { + if (set & TIOCM_DTR) dev_dbg(dev, "%s - Setting DTR\n", __func__); else dev_dbg(dev, "%s - Clearing DTR\n", __func__); @@ -449,13 +449,13 @@ static int kobil_tiocmset(struct tty_str usb_sndctrlpipe(port->serial->dev, 0), SUSBCRequest_SetStatusLinesOrQueues, USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, - ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR), + ((set & TIOCM_DTR) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR), 0, NULL, 0, KOBIL_TIMEOUT); - } else { - if (rts != 0) + } else if (rts) { + if (set & TIOCM_RTS) dev_dbg(dev, "%s - Setting RTS\n", __func__); else dev_dbg(dev, "%s - Clearing RTS\n", __func__); @@ -463,7 +463,7 @@ static int kobil_tiocmset(struct tty_str usb_sndctrlpipe(port->serial->dev, 0), SUSBCRequest_SetStatusLinesOrQueues, USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, - ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS), + ((set & TIOCM_RTS) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS), 0, NULL, 0,