Commit 
2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for
serial engine DMA") renamed rx_fifo member to rf_buf which caused a
build failure when 
b8caf69a6946 ("tty: serial: qcom-geni-serial: fix
slab-out-of-bounds on RX FIFO buffer") from tty-linus was merged into
tty-next.
Fix the member variable name.
Fixes: 7a6aa989f2e8 ("Merge 6.2-rc5 into tty-next")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230123173857.40695-2-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
        uport->fifosize =
                (port->tx_fifo_depth * port->tx_fifo_width) / BITS_PER_BYTE;
 
-       if (port->rx_fifo && (old_rx_fifo_depth != port->rx_fifo_depth) && port->rx_fifo_depth) {
-               port->rx_fifo = devm_krealloc(uport->dev, port->rx_fifo,
-                                             port->rx_fifo_depth * sizeof(u32),
-                                             GFP_KERNEL);
-               if (!port->rx_fifo)
+       if (port->rx_buf && (old_rx_fifo_depth != port->rx_fifo_depth) && port->rx_fifo_depth) {
+               port->rx_buf = devm_krealloc(uport->dev, port->rx_buf,
+                                            port->rx_fifo_depth * sizeof(u32),
+                                            GFP_KERNEL);
+               if (!port->rx_buf)
                        return -ENOMEM;
        }