From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pf0-f196.google.com ([209.85.192.196]:32836 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752434AbcGYAGH (ORCPT ); Sun, 24 Jul 2016 20:06:07 -0400 Received: by mail-pf0-f196.google.com with SMTP id i6so10837590pfe.0 for ; Sun, 24 Jul 2016 17:06:06 -0700 (PDT) From: Matt Ranostay To: linux-hwmon@vger.kernel.org Cc: jdelvare@suse.de, Matt Ranostay , Guenter Roeck , David Frey Subject: [PATCH v2] hwmon: (sht3x) set initial jiffies to last_update Date: Sun, 24 Jul 2016 17:05:32 -0700 Message-Id: <1469405132-7044-1-git-send-email-mranostay@gmail.com> Sender: linux-hwmon-owner@vger.kernel.org List-Id: linux-hwmon@vger.kernel.org Handling the wraparound requires the data->last_update to be set to an initial jiffies value. Otherwise on 32-bit systems you will not be able to request a reading till the 5 minute jiffies rollover happens. Cc: Guenter Roeck Cc: David Frey Signed-off-by: Matt Ranostay --- Changes from v1: * document more in commit message the reason for the patch * mark last sample before driver load so initial reading can happen shortly after boot drivers/hwmon/sht3x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/sht3x.c b/drivers/hwmon/sht3x.c index b73a48832732..6ea99cd6ae79 100644 --- a/drivers/hwmon/sht3x.c +++ b/drivers/hwmon/sht3x.c @@ -720,7 +720,7 @@ static int sht3x_probe(struct i2c_client *client, data->setup.blocking_io = false; data->setup.high_precision = true; data->mode = 0; - data->last_update = 0; + data->last_update = jiffies - msecs_to_jiffies(3000); data->client = client; crc8_populate_msb(sht3x_crc8_table, SHT3X_CRC8_POLYNOMIAL); -- 2.7.4