linux-kernel - [PATCH 5/8] Char: n_r3964, use wait_event

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Message-id: <19836306752961214186@wsc.cz>
Date:	Mon, 28 May 2007 15:29:08 +0200 (CEST)
From:	Jiri Slaby <jirislaby@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH 5/8] Char: n_r3964, use wait_event_interruptible

n_r3964, use wait_event_interruptible

Signed-off-by: Jiri Slaby <jirislaby@...il.com>

---
commit 2b7813d0f34703e0a4b18593a3186bdc7e719c06
tree 657e6eef237faac65c0c90920e3bb1ae5a8027d9
parent d45ae897fff813cf27d5d6ddfd92d19806831965
author Jiri Slaby <jirislaby@...il.com> Sat, 26 May 2007 21:45:39 +0200
committer Jiri Slaby <jirislaby@...il.com> Sat, 26 May 2007 21:45:39 +0200

 drivers/char/n_r3964.c |   14 ++------------
 1 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index 14557a4..6b918b8 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -1071,8 +1071,6 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
 	struct r3964_client_info *pClient;
 	struct r3964_message *pMsg;
 	struct r3964_client_message theMsg;
-	DECLARE_WAITQUEUE(wait, current);
-
 	int count;
 
 	TRACE_L("read()");
@@ -1086,16 +1084,8 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
 				return -EAGAIN;
 			}
 			/* block until there is a message: */
-			add_wait_queue(&pInfo->read_wait, &wait);
-repeat:
-			__set_current_state(TASK_INTERRUPTIBLE);
-			pMsg = remove_msg(pInfo, pClient);
-			if (!pMsg && !signal_pending(current)) {
-				schedule();
-				goto repeat;
-			}
-			__set_current_state(TASK_RUNNING);
-			remove_wait_queue(&pInfo->read_wait, &wait);
+			wait_event_interruptible(pInfo->read_wait,
+					(pMsg = remove_msg(pInfo, pClient)));
 		}
 
 		/* If we still haven't got a message, we must have been signalled */
-
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