Commit 1a9a5910 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by Greg Kroah-Hartman
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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: default avatarJiri Slaby <jirislaby@kernel.org>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220823141839.165244-3-ilpo.jarvinen@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 575ca2cb

drivers/tty/serial/pch_uart.c

+1 −3
Original line number Diff line number Diff line
@@ -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);