linux-kernel - [PATCH 1/3] staging: i4l: pcbit: drv: use setup_timer() and mod

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Message-Id: <1462975084-3904-1-git-send-email-falakreyaz@gmail.com>
Date:	Wed, 11 May 2016 19:24:59 +0530
From:	Muhammad Falak R Wani <falakreyaz@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Karsten Keil <isdn@...ux-pingi.de>, Arnd Bergmann <arnd@...db.de>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] staging: i4l: pcbit: drv: use setup_timer() and mod_timer().

Use setup_timer() instead of init_timer(), being the preferred/standard
way to set a timer up.

Also, quoting the mod_timer() function comment:
-> mod_timer() is a more efficient way to update the expire field of an
   active timer (if the timer is inactive it will be activated).

Use setup_timer and mod_timer to setup and arm a timer, to make the code
cleaner and easier to read.

Signed-off-by: Muhammad Falak R Wani <falakreyaz@...il.com>
---
 drivers/staging/i4l/pcbit/drv.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/i4l/pcbit/drv.c b/drivers/staging/i4l/pcbit/drv.c
index c5270e2..d417df5 100644
--- a/drivers/staging/i4l/pcbit/drv.c
+++ b/drivers/staging/i4l/pcbit/drv.c
@@ -359,11 +359,9 @@ static int pcbit_xmit(int driver, int chnum, int ack, struct sk_buff *skb)
 		 */
 #ifdef BLOCK_TIMER
 		if (chan->block_timer.function == NULL) {
-			init_timer(&chan->block_timer);
-			chan->block_timer.function =  &pcbit_block_timer;
-			chan->block_timer.data = (long) chan;
-			chan->block_timer.expires = jiffies + 1 * HZ;
-			add_timer(&chan->block_timer);
+			setup_timer(&chan->block_timer, &pcbit_block_timer,
+				    (long)chan);
+			mod_timer(&chan->block_timer, jiffies + 1 * HZ);
 		}
 #endif
 		return 0;
@@ -804,11 +802,7 @@ static int set_protocol_running(struct pcbit_dev *dev)
 {
 	isdn_ctrl ctl;
 
-	init_timer(&dev->set_running_timer);
-
-	dev->set_running_timer.function = &set_running_timeout;
-	dev->set_running_timer.data = (ulong) dev;
-	dev->set_running_timer.expires = jiffies + SET_RUN_TIMEOUT;
+	setup_timer(&dev->set_running_timer, &set_running_timeout, (ulong)dev);
 
 	/* kick it */
 
@@ -817,7 +811,7 @@ static int set_protocol_running(struct pcbit_dev *dev)
 	writeb((0x80U | ((dev->rcv_seq & 0x07) << 3) | (dev->send_seq & 0x07)),
 	       dev->sh_mem + BANK4);
 
-	add_timer(&dev->set_running_timer);
+	mod_timer(&dev->set_running_timer, jiffies + SET_RUN_TIMEOUT);
 
 	wait_event(dev->set_running_wq, dev->l2_state == L2_RUNNING ||
 					dev->l2_state == L2_DOWN);
-- 
1.9.1