linux-kernel - [PATCH 06/12] 8250_tegra: clean up tegra_uart_handle

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Date:   Tue,  5 Jan 2021 13:02:33 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
Subject: [PATCH 06/12] 8250_tegra: clean up tegra_uart_handle_break

* switch "do { A; } while (1)" to "while (1) { A; }"
* switch "if (A) B; else break;" to "if (!A) break; B;"
* remove unused assignment from p->serial_in() to status

Objdump -d shows no difference.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Thierry Reding <thierry.reding@...il.com>
Cc: Jonathan Hunter <jonathanh@...dia.com>
---
 drivers/tty/serial/8250/8250_tegra.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_tegra.c b/drivers/tty/serial/8250/8250_tegra.c
index c0ffad1572c6..e13ae18b0713 100644
--- a/drivers/tty/serial/8250/8250_tegra.c
+++ b/drivers/tty/serial/8250/8250_tegra.c
@@ -26,16 +26,17 @@ static void tegra_uart_handle_break(struct uart_port *p)
 {
 	unsigned int status, tmout = 10000;
 
-	do {
+	while (1) {
 		status = p->serial_in(p, UART_LSR);
-		if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
-			status = p->serial_in(p, UART_RX);
-		else
+		if (!(status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS)))
 			break;
+
+		p->serial_in(p, UART_RX);
+
 		if (--tmout == 0)
 			break;
 		udelay(1);
-	} while (1);
+	}
 }
 
 static int tegra_uart_probe(struct platform_device *pdev)
-- 
2.30.0