linux-kernel - [PATCH 3.2 011/164] cdc-wdm: fix endianness bug in debug statements

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Message-ID: <lsq.1438473757.139588714@decadent.org.uk>
Date:	Sun, 02 Aug 2015 01:02:37 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	"Oliver Neukum" <oneukum@...e.de>
Subject: [PATCH 3.2 011/164] cdc-wdm: fix endianness bug in debug statements

3.2.70-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Oliver Neukum <oneukum@...e.de>

commit 323ece54e0761198946ecd0c2091f1d2bfdfcb64 upstream.

Values directly from descriptors given in debug statements
must be converted to native endianness.

Signed-off-by: Oliver Neukum <oneukum@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/usb/class/cdc-wdm.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -224,7 +224,7 @@ static void wdm_int_callback(struct urb
 	case USB_CDC_NOTIFY_RESPONSE_AVAILABLE:
 		dev_dbg(&desc->intf->dev,
 			"NOTIFY_RESPONSE_AVAILABLE received: index %d len %d",
-			dr->wIndex, dr->wLength);
+			le16_to_cpu(dr->wIndex), le16_to_cpu(dr->wLength));
 		break;
 
 	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
@@ -237,14 +237,16 @@ static void wdm_int_callback(struct urb
 		clear_bit(WDM_POLL_RUNNING, &desc->flags);
 		dev_err(&desc->intf->dev,
 			"unknown notification %d received: index %d len %d\n",
-			dr->bNotificationType, dr->wIndex, dr->wLength);
+			dr->bNotificationType,
+			le16_to_cpu(dr->wIndex),
+			le16_to_cpu(dr->wLength));
 		goto exit;
 	}
 
 	req->bRequestType = (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE);
 	req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
 	req->wValue = 0;
-	req->wIndex = desc->inum;
+	req->wIndex = desc->inum; /* already converted */
 	req->wLength = cpu_to_le16(desc->wMaxCommand);
 
 	usb_fill_control_urb(
@@ -401,7 +403,7 @@ static ssize_t wdm_write
 			     USB_RECIP_INTERFACE);
 	req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
 	req->wValue = 0;
-	req->wIndex = desc->inum;
+	req->wIndex = desc->inum; /* already converted */
 	req->wLength = cpu_to_le16(count);
 	set_bit(WDM_IN_USE, &desc->flags);
 	desc->outbuf = buf;
@@ -414,7 +416,7 @@ static ssize_t wdm_write
 		dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);
 	} else {
 		dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",
-			req->wIndex);
+			le16_to_cpu(req->wIndex));
 	}
 out:
 	usb_autopm_put_interface(desc->intf);

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