--- zzzz-none-000/linux-3.10.107/drivers/usb/serial/kobil_sct.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/usb/serial/kobil_sct.c	2021-02-04 17:41:59.000000000 +0000
@@ -25,7 +25,6 @@
 
 #include <linux/kernel.h>
 #include <linux/errno.h>
-#include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
@@ -206,7 +205,7 @@
 			  KOBIL_TIMEOUT
 	);
 	dev_dbg(dev, "%s - Send get_HW_version URB returns: %i\n", __func__, result);
-	dev_dbg(dev, "Harware version: %i.%i.%i\n", transfer_buffer[0],
+	dev_dbg(dev, "Hardware version: %i.%i.%i\n", transfer_buffer[0],
 		transfer_buffer[1], transfer_buffer[2]);
 
 	/* get firmware version */
@@ -228,13 +227,13 @@
 			priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 		/* Setting Baudrate, Parity and Stopbits */
 		result = usb_control_msg(port->serial->dev,
-			  usb_rcvctrlpipe(port->serial->dev, 0),
+			  usb_sndctrlpipe(port->serial->dev, 0),
 			  SUSBCRequest_SetBaudRateParityAndStopBits,
 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 			  SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity |
 							SUSBCR_SPASB_1StopBit,
 			  0,
-			  transfer_buffer,
+			  NULL,
 			  0,
 			  KOBIL_TIMEOUT
 		);
@@ -242,12 +241,12 @@
 
 		/* reset all queues */
 		result = usb_control_msg(port->serial->dev,
-			  usb_rcvctrlpipe(port->serial->dev, 0),
+			  usb_sndctrlpipe(port->serial->dev, 0),
 			  SUSBCRequest_Misc,
 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 			  SUSBCR_MSC_ResetAllQueues,
 			  0,
-			  transfer_buffer,
+			  NULL,
 			  0,
 			  KOBIL_TIMEOUT
 		);
@@ -257,7 +256,7 @@
 	    priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 	    priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 		/* start reading (Adapter B 'cause PNP string) */
-		result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
+		result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 		dev_dbg(dev, "%s - Send read URB returns: %i\n", __func__, result);
 	}
 
@@ -428,8 +427,6 @@
 	int result;
 	int dtr = 0;
 	int rts = 0;
-	unsigned char *transfer_buffer;
-	int transfer_buffer_length = 8;
 
 	/* FIXME: locking ? */
 	priv = usb_get_serial_port_data(port);
@@ -439,11 +436,6 @@
 		return -EINVAL;
 	}
 
-	/* allocate memory for transfer buffer */
-	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
-	if (!transfer_buffer)
-		return -ENOMEM;
-
 	if (set & TIOCM_RTS)
 		rts = 1;
 	if (set & TIOCM_DTR)
@@ -459,12 +451,12 @@
 		else
 			dev_dbg(dev, "%s - Clearing DTR\n", __func__);
 		result = usb_control_msg(port->serial->dev,
-			  usb_rcvctrlpipe(port->serial->dev, 0),
+			  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),
 			  0,
-			  transfer_buffer,
+			  NULL,
 			  0,
 			  KOBIL_TIMEOUT);
 	} else {
@@ -473,17 +465,16 @@
 		else
 			dev_dbg(dev, "%s - Clearing RTS\n", __func__);
 		result = usb_control_msg(port->serial->dev,
-			usb_rcvctrlpipe(port->serial->dev, 0),
+			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),
 			0,
-			transfer_buffer,
+			NULL,
 			0,
 			KOBIL_TIMEOUT);
 	}
 	dev_dbg(dev, "%s - Send set_status_line URB returns: %i\n", __func__, result);
-	kfree(transfer_buffer);
 	return (result < 0) ? result : 0;
 }
 
@@ -528,7 +519,7 @@
 	tty_encode_baud_rate(tty, speed, speed);
 
 	result = usb_control_msg(port->serial->dev,
-		  usb_rcvctrlpipe(port->serial->dev, 0),
+		  usb_sndctrlpipe(port->serial->dev, 0),
 		  SUSBCRequest_SetBaudRateParityAndStopBits,
 		  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 		  urb_val,
@@ -544,8 +535,6 @@
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct kobil_private *priv = usb_get_serial_port_data(port);
-	unsigned char *transfer_buffer;
-	int transfer_buffer_length = 8;
 	int result;
 
 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
@@ -555,24 +544,20 @@
 
 	switch (cmd) {
 	case TCFLSH:
-		transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL);
-		if (!transfer_buffer)
-			return -ENOBUFS;
-
 		result = usb_control_msg(port->serial->dev,
-			  usb_rcvctrlpipe(port->serial->dev, 0),
+			  usb_sndctrlpipe(port->serial->dev, 0),
 			  SUSBCRequest_Misc,
 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 			  SUSBCR_MSC_ResetAllQueues,
 			  0,
-			  NULL, /* transfer_buffer, */
+			  NULL,
 			  0,
 			  KOBIL_TIMEOUT
 			);
 
 		dev_dbg(&port->dev,
-			"%s - Send reset_all_queues (FLUSH) URB returns: %i", __func__, result);
-		kfree(transfer_buffer);
+			"%s - Send reset_all_queues (FLUSH) URB returns: %i\n",
+			__func__, result);
 		return (result < 0) ? -EIO: 0;
 	default:
 		return -ENOIOCTLCMD;