USB: cdc-wdm: cleanup error codes

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The internal error codes returned in the write() code
path cannot be simply passed on to user space.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/class/cdc-wdm.c

@@ -368,6 +368,7 @@ static ssize_t wdm_write
 	r = usb_autopm_get_interface(desc->intf);
 	if (r < 0) {
 		kfree(buf);
+		rv = usb_translate_errors(r);
 		goto outnp;
 	}
 
@@ -383,6 +384,7 @@ static ssize_t wdm_write
 
 	if (r < 0) {
 		kfree(buf);
+		rv = r;
 		goto out;
 	}
 
@@ -412,6 +414,7 @@ static ssize_t wdm_write
 		kfree(buf);
 		clear_bit(WDM_IN_USE, &desc->flags);
 		dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);
+		rv = usb_translate_errors(rv);
 	} else {
 		dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d",
 			req->wIndex);
@@ -593,6 +596,7 @@ static int wdm_open(struct inode *inode, struct file *file)
 			desc->count--;
 			dev_err(&desc->intf->dev,
 				"Error submitting int urb - %d\n", rv);
+			rv = usb_translate_errors(rv);
 		}
 	} else {
 		rv = 0;