From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 9 Sep 2022 09:11:02 +0000 (+0300)
Subject: serial: 8250_dma: Convert to use uart_xmit_advance()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e02fbb0bcb9b6d5f83f01af87bc643dd0d78319b;p=linux.git

serial: 8250_dma: Convert to use uart_xmit_advance()

uart_xmit_advance() provides a common way on how to advance
the Tx queue. Use it for the sake of unification and robustness.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220909091102.58941-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index d99020fd34273..b85c82616e8cb 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -26,9 +26,7 @@ static void __dma_tx_complete(void *param)
 
 	dma->tx_running = 0;
 
-	xmit->tail += dma->tx_size;
-	xmit->tail &= UART_XMIT_SIZE - 1;
-	p->port.icount.tx += dma->tx_size;
+	uart_xmit_advance(&p->port, dma->tx_size);
 
 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
 		uart_write_wakeup(&p->port);