From: David S. Miller <davem@sunset.davemloft.net>
Date: Tue, 17 Jul 2007 00:05:11 +0000 (-0700)
Subject: [SERIAL] SUNHV: Fix jerky console on LDOM guests.
X-Git-Tag: v2.6.23-rc1~769^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f798634d806615bee27d1b83479034087a02aa0f;p=linux-2.6

[SERIAL] SUNHV: Fix jerky console on LDOM guests.

Mixing putchar() and write() hvcalls does not work %100
correctly.  But we should be using write() all the time
if we can, even from ->start_tx(), anyways.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c
index 17bcca53d6..d82be42ff2 100644
--- a/drivers/serial/sunhv.c
+++ b/drivers/serial/sunhv.c
@@ -258,17 +258,7 @@ static void sunhv_stop_tx(struct uart_port *port)
 /* port->lock held by caller.  */
 static void sunhv_start_tx(struct uart_port *port)
 {
-	struct circ_buf *xmit = &port->info->xmit;
-
-	while (!uart_circ_empty(xmit)) {
-		long status = sun4v_con_putchar(xmit->buf[xmit->tail]);
-
-		if (status != HV_EOK)
-			break;
-
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
-	}
+	transmit_chars(port);
 }
 
 /* port->lock is not held.  */