Commit 575ca2cb authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by Greg Kroah-Hartman
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serial: sh-sci: tail is already on valid range 



There is no need to and tail with UART_XMIT_SIZE - 1 because tail is
already on valid range.

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/20220823141839.165244-2-ilpo.jarvinen@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a54dc4b3

drivers/tty/serial/sh-sci.c

+1 −1
Original line number Diff line number Diff line
@@ -1407,7 +1407,7 @@ static void sci_dma_tx_work_fn(struct work_struct *work) 
	spin_lock_irq(&port->lock);

	head = xmit->head;

	tail = xmit->tail;

	buf = s->tx_dma_addr + (tail & (UART_XMIT_SIZE - 1));

	buf = s->tx_dma_addr + tail;

	s->tx_dma_len = CIRC_CNT_TO_END(head, tail, UART_XMIT_SIZE);

	if (!s->tx_dma_len) {

		/* Transmit buffer has been flushed */