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serial: pch_uart: CIRC_CNT_TO_END() is enough

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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>
This commit is contained in:
Ilpo Järvinen 2022-08-23 17:18:39 +03:00 committed by Greg Kroah-Hartman
parent 575ca2cb89
commit 1a9a591046
1 changed files with 1 additions and 3 deletions
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4
drivers/tty/serial/pch_uart.c
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@ -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);