From: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Date: Tue, 23 Aug 2022 14:18:39 +0000 (+0300)
Subject: serial: pch_uart: CIRC_CNT_TO_END() is enough
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1a9a59104646417ef2d71a7dcfc5243672c9d8e6;p=linux.git

serial: pch_uart: CIRC_CNT_TO_END() is enough

Testing also CIRC_CNT() with CIRC_CNT_TO_END() is unnecessary because
to latter alone covers all necessary cases.

Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220823141839.165244-3-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 11ba5df0618fa..c59ce78865799 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -898,9 +898,7 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv)
 		fifo_size--;
 	}
 
-	bytes = min((int)CIRC_CNT(xmit->head, xmit->tail,
-			     UART_XMIT_SIZE), CIRC_CNT_TO_END(xmit->head,
-			     xmit->tail, UART_XMIT_SIZE));
+	bytes = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
 	if (!bytes) {
 		dev_dbg(priv->port.dev, "%s 0 bytes return\n", __func__);
 		pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_TX_INT);