linux-kernel - [PATCH] USB: legotower: use msecs_to

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Message-Id: <1423216711-1829-1-git-send-email-hofrat@osadl.org>
Date:	Fri,  6 Feb 2015 04:58:31 -0500
From:	Nicholas Mc Guire <hofrat@...dl.org>
To:	Juergen Stuber <starblue@...rs.sourceforge.net>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	legousb-devel@...ts.sourceforge.net, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH] USB: legotower: use msecs_to_jiffies for time conversion

This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).

Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
---

Patch was only compile tested with x86_64_defconfig + CONFIG_USB_LEGOTOWER=m

Patch is against 3.19.0-rc7 (localversion-next is -next-20150204)

 drivers/usb/misc/legousbtower.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index 97cd9e2..7771be3 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -574,7 +574,7 @@ static ssize_t tower_read (struct file *file, char __user *buffer, size_t count,
 	}
 
 	if (read_timeout) {
-		timeout = jiffies + read_timeout * HZ / 1000;
+		timeout = jiffies + msecs_to_jiffies(read_timeout);
 	}
 
 	/* wait for data */
@@ -592,7 +592,7 @@ static ssize_t tower_read (struct file *file, char __user *buffer, size_t count,
 		/* reset read timeout during read or write activity */
 		if (read_timeout
 		    && (dev->read_buffer_length || dev->interrupt_out_busy)) {
-			timeout = jiffies + read_timeout * HZ / 1000;
+			timeout = jiffies + msecs_to_jiffies(read_timeout);
 		}
 		/* check for read timeout */
 		if (read_timeout && time_after (jiffies, timeout)) {
@@ -831,7 +831,7 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device
 	dev->read_buffer_length = 0;
 	dev->read_packet_length = 0;
 	spin_lock_init (&dev->read_buffer_lock);
-	dev->packet_timeout_jiffies = packet_timeout * HZ / 1000;
+	dev->packet_timeout_jiffies = msecs_to_jiffies(packet_timeout);
 	dev->read_last_arrival = jiffies;
 
 	init_waitqueue_head (&dev->read_wait);
-- 
1.7.10.4

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