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authorSonic Zhang <sonic.zhang@analog.com>2010-10-27 10:16:48 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-11-11 20:06:08 +0100
commit001a05d56edd9d82b27e69951fb9520f9ce6ed72 (patch)
tree570468ad8f31ede2f3c266e3a399e9fd295e886d /drivers/serial
parentserial: bfin_5xx: always include DMA headers (diff)
downloadlinux-001a05d56edd9d82b27e69951fb9520f9ce6ed72.tar.xz
linux-001a05d56edd9d82b27e69951fb9520f9ce6ed72.zip
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>
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/bfin_5xx.c1
1 files changed, 0 insertions, 1 deletions
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)