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Commit 001a05d5 authored by Sonic Zhang's avatar Sonic Zhang Committed by Greg Kroah-Hartman
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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: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent b6100992

drivers/serial/bfin_5xx.c

+0 −1
Original line number Diff line number Diff line
@@ -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)