From: Ilpo Järvinen Date: Tue, 23 Aug 2022 14:18:38 +0000 (+0300) Subject: serial: sh-sci: tail is already on valid range X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=575ca2cb89ea1dafc4005a208e77e7cd3f3edb40;p=linux.git 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: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20220823141839.165244-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index cd41fe069b897..62f773286d44b 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -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 */