Re: [PATCH v2 1/6] serial: msm: Convert container_of UART_TO_MSM to static inline

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On 21. 06. 22, 14:49, Ilpo Järvinen wrote:

Create static inline instead of define.
I know it's obvious, but next time, it would be nice if you specify why you're doing things, not what you're doing. I.e. amending something like: ", because it's more obvious, type safer, much more readable, and avoids bad macro expansion -- uart_port can "escape" as it is not in parentheses." 


Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>


Reviewed-by: Jiri Slaby <jirislaby@xxxxxxxxxx>


---
  drivers/tty/serial/msm_serial.c | 49 +++++++++++++++++----------------
  1 file changed, 26 insertions(+), 23 deletions(-)

diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index e676ec761f18..15cab9c4b295 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -181,7 +181,10 @@ struct msm_port {
  	struct msm_dma		rx_dma;
  };
-#define UART_TO_MSM(uart_port) container_of(uart_port, struct msm_port, uart) 
+static inline struct msm_port *to_msm_port(struct uart_port *up)
+{
+	return container_of(up, struct msm_port, uart);
+}
static 
  void msm_write(struct uart_port *port, unsigned int val, unsigned int off)
@@ -221,7 +224,7 @@ static void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port)
static void msm_serial_set_mnd_regs(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
/* 
  	 * These registers don't exist so we change the clk input rate
@@ -404,7 +407,7 @@ static inline void msm_wait_for_xmitr(struct uart_port *port)
static void msm_stop_tx(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
msm_port->imr &= ~UART_IMR_TXLEV; 
  	msm_write(port, msm_port->imr, UART_IMR);
@@ -412,7 +415,7 @@ static void msm_stop_tx(struct uart_port *port)
static void msm_start_tx(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	struct msm_dma *dma = &msm_port->tx_dma;
/* Already started in DMA mode */ 
@@ -690,7 +693,7 @@ static void msm_start_rx_dma(struct msm_port *msm_port)
static void msm_stop_rx(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	struct msm_dma *dma = &msm_port->rx_dma;
msm_port->imr &= ~(UART_IMR_RXLEV | UART_IMR_RXSTALE); 
@@ -702,7 +705,7 @@ static void msm_stop_rx(struct uart_port *port)
static void msm_enable_ms(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
msm_port->imr |= UART_IMR_DELTA_CTS; 
  	msm_write(port, msm_port->imr, UART_IMR);
@@ -714,7 +717,7 @@ static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr)
  	struct tty_port *tport = &port->state->port;
  	unsigned int sr;
  	int count = 0;
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
if ((msm_read(port, UART_SR) & UART_SR_OVERRUN)) { 
  		port->icount.overrun++;
@@ -837,7 +840,7 @@ static void msm_handle_rx(struct uart_port *port)
  static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count)
  {
  	struct circ_buf *xmit = &port->state->xmit;
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	unsigned int num_chars;
  	unsigned int tf_pointer = 0;
  	void __iomem *tf;
@@ -883,7 +886,7 @@ static void msm_handle_tx_pio(struct uart_port *port, unsigned int tx_count)
static void msm_handle_tx(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	struct circ_buf *xmit = &msm_port->uart.state->xmit;
  	struct msm_dma *dma = &msm_port->tx_dma;
  	unsigned int pio_count, dma_count, dma_min;
@@ -947,7 +950,7 @@ static void msm_handle_delta_cts(struct uart_port *port)
  static irqreturn_t msm_uart_irq(int irq, void *dev_id)
  {
  	struct uart_port *port = dev_id;
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	struct msm_dma *dma = &msm_port->rx_dma;
  	unsigned long flags;
  	unsigned int misr;
@@ -1002,7 +1005,7 @@ static unsigned int msm_get_mctrl(struct uart_port *port)
static void msm_reset(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	unsigned int mr;
/* reset everything */ 
@@ -1055,7 +1058,7 @@ static const struct msm_baud_map *
  msm_find_best_baud(struct uart_port *port, unsigned int baud,
  		   unsigned long *rate)
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	unsigned int divisor, result;
  	unsigned long target, old, best_rate = 0, diff, best_diff = ULONG_MAX;
  	const struct msm_baud_map *entry, *end, *best;
@@ -1124,7 +1127,7 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud,
  			     unsigned long *saved_flags)
  {
  	unsigned int rxstale, watermark, mask;
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	const struct msm_baud_map *entry;
  	unsigned long flags, rate;
@@ -1185,7 +1188,7 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, static void msm_init_clock(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
clk_prepare_enable(msm_port->clk); 
  	clk_prepare_enable(msm_port->pclk);
@@ -1194,7 +1197,7 @@ static void msm_init_clock(struct uart_port *port)
static int msm_startup(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	unsigned int data, rfr_level, mask;
  	int ret;
@@ -1246,7 +1249,7 @@ static int msm_startup(struct uart_port *port) static void msm_shutdown(struct uart_port *port) 
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
msm_port->imr = 0; 
  	msm_write(port, 0, UART_IMR); /* disable interrupts */
@@ -1262,7 +1265,7 @@ static void msm_shutdown(struct uart_port *port)
  static void msm_set_termios(struct uart_port *port, struct ktermios *termios,
  			    struct ktermios *old)
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	struct msm_dma *dma = &msm_port->rx_dma;
  	unsigned long flags;
  	unsigned int baud, mr;
@@ -1416,7 +1419,7 @@ static int msm_verify_port(struct uart_port *port, struct serial_struct *ser)
  static void msm_power(struct uart_port *port, unsigned int state,
  		      unsigned int oldstate)
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
switch (state) { 
  	case 0:
@@ -1435,7 +1438,7 @@ static void msm_power(struct uart_port *port, unsigned int state,
  #ifdef CONFIG_CONSOLE_POLL
  static int msm_poll_get_char_single(struct uart_port *port)
  {
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
  	unsigned int rf_reg = msm_port->is_uartdm ? UARTDM_RF : UART_RF;
if (!(msm_read(port, UART_SR) & UART_SR_RX_READY)) 
@@ -1489,7 +1492,7 @@ static int msm_poll_get_char(struct uart_port *port)
  {
  	u32 imr;
  	int c;
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
/* Disable all interrupts */ 
  	imr = msm_read(port, UART_IMR);
@@ -1509,7 +1512,7 @@ static int msm_poll_get_char(struct uart_port *port)
  static void msm_poll_put_char(struct uart_port *port, unsigned char c)
  {
  	u32 imr;
-	struct msm_port *msm_port = UART_TO_MSM(port);
+	struct msm_port *msm_port = to_msm_port(port);
/* Disable all interrupts */ 
  	imr = msm_read(port, UART_IMR);
@@ -1677,7 +1680,7 @@ static void msm_console_write(struct console *co, const char *s,
  	BUG_ON(co->index < 0 || co->index >= UART_NR);
port = msm_get_port_from_line(co->index); 
-	msm_port = UART_TO_MSM(port);
+	msm_port = to_msm_port(port);
__msm_console_write(port, s, count, msm_port->is_uartdm); 
  }
@@ -1808,7 +1811,7 @@ static int msm_serial_probe(struct platform_device *pdev)
port = msm_get_port_from_line(line); 
  	port->dev = &pdev->dev;
-	msm_port = UART_TO_MSM(port);
+	msm_port = to_msm_port(port);
id = of_match_device(msm_uartdm_table, &pdev->dev); 
  	if (id)



--
js
suse labs
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