i2c: xiic: Correct the datatype for rx_watermark

The message length data type should be u16 as per the i2c_msg structure.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Author: Shubhrajyoti Datta

drivers/i2c/busses/i2c-xiic.c

@@ -578,7 +578,7 @@ static int xiic_busy(struct xiic_i2c *i2c)
 
 static void xiic_start_recv(struct xiic_i2c *i2c)
 {
-	u8 rx_watermark;
+	u16 rx_watermark;
 	struct i2c_msg *msg = i2c->rx_msg = i2c->tx_msg;
 
 	/* Clear and enable Rx full interrupt. */
@@ -593,7 +593,7 @@ static void xiic_start_recv(struct xiic_i2c *i2c)
 	rx_watermark = msg->len;
 	if (rx_watermark > IIC_RX_FIFO_DEPTH)
 		rx_watermark = IIC_RX_FIFO_DEPTH;
-	xiic_setreg8(i2c, XIIC_RFD_REG_OFFSET, rx_watermark - 1);
+	xiic_setreg8(i2c, XIIC_RFD_REG_OFFSET, (u8)(rx_watermark - 1));
 
 	if (!(msg->flags & I2C_M_NOSTART))
 		/* write the address */