tty: serial: altera_uart_{r,t}x_chars() need only uart_port

[ Upstream commit 3af44d9bb0539d5fa27d6159d696fda5f3747bff ]

Both altera_uart_{r,t}x_chars() need only uart_port, not altera_uart. So
pass the former from altera_uart_interrupt() directly.

Apart it maybe saves a dereference, this makes the transition of
altera_uart_tx_chars() easier to follow in the next patch.

Cc: Tobias Klauser <tklauser@distanz.ch>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-4-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 1307c5d33cce ("serial: altera_uart: fix locking in polling mode")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 0e19455..6e08fa1 100644 (file)
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -199,9 +199,8 @@ static void altera_uart_set_termios(struct uart_port *port,
         */
 }
 
-static void altera_uart_rx_chars(struct altera_uart *pp)
+static void altera_uart_rx_chars(struct uart_port *port)
 {
-       struct uart_port *port = &pp->port;
        unsigned char ch, flag;
        unsigned short status;
 
@@ -246,9 +245,8 @@ static void altera_uart_rx_chars(struct altera_uart *pp)
        tty_flip_buffer_push(&port->state->port);
 }
 
-static void altera_uart_tx_chars(struct altera_uart *pp)
+static void altera_uart_tx_chars(struct uart_port *port)
 {
-       struct uart_port *port = &pp->port;
        struct circ_buf *xmit = &port->state->xmit;
 
        if (port->x_char) {
@@ -286,9 +284,9 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data)
 
        spin_lock(&port->lock);
        if (isr & ALTERA_UART_STATUS_RRDY_MSK)
-               altera_uart_rx_chars(pp);
+               altera_uart_rx_chars(port);
        if (isr & ALTERA_UART_STATUS_TRDY_MSK)
-               altera_uart_tx_chars(pp);
+               altera_uart_tx_chars(port);
        spin_unlock(&port->lock);
 
        return IRQ_RETVAL(isr);