From 001a05d56edd9d82b27e69951fb9520f9ce6ed72 Mon Sep 17 00:00:00 2001 From: Sonic Zhang <sonic.zhang@analog.com> Date: Wed, 27 Oct 2010 04:16:48 -0400 Subject: [PATCH] serial: bfin_5xx: remove redundant SSYNC to improve TX speed We don't need to force a SSYNC here as the LSR register will already be updated by the time we get back to reading it. This speeds up TX throughput and lowers general system overhead (since SSYNC is system wide, not peripheral-specific). Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/serial/bfin_5xx.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index c8ca3b43487d..a454e427c949 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -359,7 +359,6 @@ static void bfin_serial_tx_chars(struct bfin_serial_port *uart) UART_PUT_CHAR(uart, xmit->buf[xmit->tail]); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); uart->port.icount.tx++; - SSYNC(); } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) -- GitLab