linux-kernel - [PATCH 14/14] net/bluetooth/hci_core.c: Use time

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Message-Id: <1203003412-11594-15-git-send-email-caglar@pardus.org.tr>
Date:	Thu, 14 Feb 2008 17:36:52 +0200
From:	S.Çağlar Onur <caglar@...dus.org.tr>
To:	linux-kernel@...r.kernel.org
Cc:	bluez-devel@...ts.sf.net,
	S.Çağlar Onur <caglar@...dus.org.tr>
Subject: [PATCH 14/14] net/bluetooth/hci_core.c: Use time_* macros

The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values.

So following patch implements usage of the time_after() macro, defined at linux/jiffies.h, which deals with wrapping correctly

Cc: bluez-devel@...ts.sf.net
Signed-off-by: S.Çağlar Onur <caglar@...dus.org.tr>
---
 net/bluetooth/hci_core.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 372b0d3..930b58e 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -24,6 +24,7 @@
 
 /* Bluetooth HCI core. */
 
+#include <linux/jiffies.h>
 #include <linux/module.h>
 #include <linux/kmod.h>
 
@@ -1321,7 +1322,7 @@ static inline void hci_sched_acl(struct hci_dev *hdev)
 	if (!test_bit(HCI_RAW, &hdev->flags)) {
 		/* ACL tx timeout must be longer than maximum
 		 * link supervision timeout (40.9 seconds) */
-		if (!hdev->acl_cnt && (jiffies - hdev->acl_last_tx) > (HZ * 45))
+		if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
 			hci_acl_tx_to(hdev);
 	}
 
@@ -1543,7 +1544,7 @@ static void hci_cmd_task(unsigned long arg)
 
 	BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
 
-	if (!atomic_read(&hdev->cmd_cnt) && (jiffies - hdev->cmd_last_tx) > HZ) {
+	if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
 		BT_ERR("%s command tx timeout", hdev->name);
 		atomic_set(&hdev->cmd_cnt, 1);
 	}
-- 
1.5.3.7

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