linux-kernel - [PATCH 1/2] Char: rocket, fix ASYNC flags

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Date:	Fri,  8 May 2009 10:32:43 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, Jiri Slaby <jirislaby@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ferenc Wagner <wferi@...f.hu>
Subject: [PATCH 1/2] Char: rocket, fix ASYNC flags

ASYNC_* flags are not bits, but rather constants, use ilog2 to obtain
bit positions and stay atomic.

Signed-off-by: Jiri Slaby <jirislaby@...il.com>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
Cc: Ferenc Wagner <wferi@...f.hu>
---
 drivers/char/rocket.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 7399188..38c18d3 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -939,7 +939,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 	/*
 	 * Info->count is now 1; so it's safe to sleep now.
 	 */
-	if (!test_bit(ASYNC_INITIALIZED, &port->flags)) {
+	if (!test_bit(ilog2(ASYNC_INITIALIZED), &port->flags)) {
 		cp = &info->channel;
 		sSetRxTrigger(cp, TRIG_1);
 		if (sGetChanStatus(cp) & CD_ACT)
@@ -963,7 +963,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp)
 		sEnRxFIFO(cp);
 		sEnTransmit(cp);
 
-		set_bit(ASYNC_INITIALIZED, &info->port.flags);
+		set_bit(ilog2(ASYNC_INITIALIZED), &info->port.flags);
 
 		/*
 		 * Set up the tty->alt_speed kludge
@@ -1646,7 +1646,7 @@ static int rp_write(struct tty_struct *tty,
 	/*  Write remaining data into the port's xmit_buf */
 	while (1) {
 		/* Hung up ? */
-		if (!test_bit(ASYNC_NORMAL_ACTIVE, &info->port.flags))
+		if (!test_bit(ilog2(ASYNC_NORMAL_ACTIVE), &info->port.flags))
 			goto end;
 		c = min(count, XMIT_BUF_SIZE - info->xmit_cnt - 1);
 		c = min(c, XMIT_BUF_SIZE - info->xmit_head);
-- 
1.6.2.4

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