linux-kernel - [PATCH net] net: hso: fix control-request directions

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Message-Id: <20210524092511.4657-1-johan@kernel.org>
Date:   Mon, 24 May 2021 11:25:11 +0200
From:   Johan Hovold <johan@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Jakub Kicinski <kuba@...nel.org>, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan@...nel.org>, stable@...r.kernel.org
Subject: [PATCH net] net: hso: fix control-request directions

The direction of the pipe argument must match the request-type direction
bit or control requests may fail depending on the host-controller-driver
implementation.

Fix the tiocmset and rfkill requests which erroneously used
usb_rcvctrlpipe().

Fixes: 72dc1c096c70 ("HSO: add option hso driver")
Cc: stable@...r.kernel.org      # 2.6.27
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/net/usb/hso.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 3ef4b2841402..ba366e9347f7 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1689,7 +1689,7 @@ static int hso_serial_tiocmset(struct tty_struct *tty,
 	spin_unlock_irqrestore(&serial->serial_lock, flags);
 
 	return usb_control_msg(serial->parent->usb,
-			       usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
+			       usb_sndctrlpipe(serial->parent->usb, 0), 0x22,
 			       0x21, val, if_num, NULL, 0,
 			       USB_CTRL_SET_TIMEOUT);
 }
@@ -2436,7 +2436,7 @@ static int hso_rfkill_set_block(void *data, bool blocked)
 	if (hso_dev->usb_gone)
 		rv = 0;
 	else
-		rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
+		rv = usb_control_msg(hso_dev->usb, usb_sndctrlpipe(hso_dev->usb, 0),
 				       enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
 				       USB_CTRL_SET_TIMEOUT);
 	mutex_unlock(&hso_dev->mutex);
-- 
2.26.3