serial: pic32: simplify pic32_sport::enable_tx_irq handling

Make it a bool, so use true+false. And remove the wrap-around macro --
i.e. access the member directly.

It makes the code more obvious.

BTW the macro did not have 'sport' in parentheses, so it was potentially
problematic wrt expansion.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220503063122.20957-6-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index 42269e96b3f83663f0affe8f9823d25fd3bbe7c6..a6d548d5833d0f73876aa469508793691ceff07e 100644 (file)
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -63,7 +63,7 @@ struct pic32_sport {
        const char *irq_rx_name;
        int irq_tx;
        const char *irq_tx_name;
-       u8 enable_tx_irq;
+       bool enable_tx_irq;
 
        bool hw_flow_ctrl;
        int cts_gpio;
@@ -74,7 +74,6 @@ struct pic32_sport {
 };
 #define to_pic32_sport(c) container_of(c, struct pic32_sport, port)
 #define pic32_get_port(sport) (&sport->port)
-#define tx_irq_enabled(sport) (sport->enable_tx_irq)
 
 static inline void pic32_uart_writel(struct pic32_sport *sport,
                                        u32 reg, u32 val)
@@ -195,16 +194,16 @@ static unsigned int pic32_uart_get_mctrl(struct uart_port *port)
  */
 static inline void pic32_uart_irqtxen(struct pic32_sport *sport, u8 en)
 {
-       if (en && !tx_irq_enabled(sport)) {
+       if (en && !sport->enable_tx_irq) {
                enable_irq(sport->irq_tx);
-               tx_irq_enabled(sport) = 1;
-       } else if (!en && tx_irq_enabled(sport)) {
+               sport->enable_tx_irq = true;
+       } else if (!en && sport->enable_tx_irq) {
                /* use disable_irq_nosync() and not disable_irq() to avoid self
                 * imposed deadlock by not waiting for irq handler to end,
                 * since this callback is called from interrupt context.
                 */
                disable_irq_nosync(sport->irq_tx);
-               tx_irq_enabled(sport) = 0;
+               sport->enable_tx_irq = false;
        }
 }
 
@@ -497,7 +496,7 @@ static int pic32_uart_startup(struct uart_port *port)
         * For each irq request_irq() is called with interrupt disabled.
         * And the irq is enabled as soon as we are ready to handle them.
         */
-       tx_irq_enabled(sport) = 0;
+       sport->enable_tx_irq = false;
 
        sport->irq_fault_name = kasprintf(GFP_KERNEL, "%s%d-fault",
                                          pic32_uart_type(port),