From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752878AbbJRJps (ORCPT ); Sun, 18 Oct 2015 05:45:48 -0400 Received: from mail-pa0-f43.google.com ([209.85.220.43]:36336 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752331AbbJRJpq (ORCPT ); Sun, 18 Oct 2015 05:45:46 -0400 From: WEN Pingbo To: dmitry.torokhov@gmail.com, arnd@arndb.de Cc: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, y2038@lists.linaro.org, WEN Pingbo Subject: [PATCH] hp_sdc: fixed y2038 problem Date: Sun, 18 Oct 2015 17:44:19 +0800 Message-Id: <1445161459-26918-1-git-send-email-pingbo.wen@linaro.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Two replacements happened in this patch: 1. using timespec64 to prevent time overflow in 2038 2. using ktime_get_ts64 to avoid wall time issues(leap second, etc) Signed-off-by: WEN Pingbo --- drivers/input/serio/hp_sdc.c | 18 +++++++++--------- include/linux/hp_sdc.h | 6 +++--- 2 files changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/input/serio/hp_sdc.c b/drivers/input/serio/hp_sdc.c index 852858e..76fb7fa 100644 --- a/drivers/input/serio/hp_sdc.c +++ b/drivers/input/serio/hp_sdc.c @@ -193,7 +193,7 @@ static void hp_sdc_take(int irq, void *dev_id, uint8_t status, uint8_t data) curr->seq[curr->idx++] = status; curr->seq[curr->idx++] = data; hp_sdc.rqty -= 2; - do_gettimeofday(&hp_sdc.rtv); + ktime_get_ts64(&hp_sdc.rtv); if (hp_sdc.rqty <= 0) { /* All data has been gathered. */ @@ -306,13 +306,13 @@ static void hp_sdc_tasklet(unsigned long foo) write_lock_irq(&hp_sdc.rtq_lock); if (hp_sdc.rcurr >= 0) { - struct timeval tv; + struct timespec64 ts64; - do_gettimeofday(&tv); - if (tv.tv_sec > hp_sdc.rtv.tv_sec) - tv.tv_usec += USEC_PER_SEC; + ktime_get_ts64(&ts64); + if (ts64.tv_sec > hp_sdc.rtv.tv_sec) + ts64.tv_nsec += NSEC_PER_SEC; - if (tv.tv_usec - hp_sdc.rtv.tv_usec > HP_SDC_MAX_REG_DELAY) { + if (ts64.tv_nsec - hp_sdc.rtv.tv_nsec > HP_SDC_MAX_REG_DELAY) { hp_sdc_transaction *curr; uint8_t tmp; @@ -321,8 +321,8 @@ static void hp_sdc_tasklet(unsigned long foo) * we'll need to figure out a way to communicate * it back to the application. and be less verbose. */ - printk(KERN_WARNING PREFIX "read timeout (%ius)!\n", - (int)(tv.tv_usec - hp_sdc.rtv.tv_usec)); + printk(KERN_WARNING PREFIX "read timeout (%llins)!\n", + (s64)(ts64.tv_nsec - hp_sdc.rtv.tv_nsec)); curr->idx += hp_sdc.rqty; hp_sdc.rqty = 0; tmp = curr->seq[curr->actidx]; @@ -551,7 +551,7 @@ unsigned long hp_sdc_put(void) /* Start a new read */ hp_sdc.rqty = curr->seq[curr->idx]; - do_gettimeofday(&hp_sdc.rtv); + ktime_get_ts64(&hp_sdc.rtv); curr->idx++; /* Still need to lock here in case of spurious irq. */ write_lock_irq(&hp_sdc.rtq_lock); diff --git a/include/linux/hp_sdc.h b/include/linux/hp_sdc.h index d392975..1535640 100644 --- a/include/linux/hp_sdc.h +++ b/include/linux/hp_sdc.h @@ -47,9 +47,9 @@ #endif -/* No 4X status reads take longer than this (in usec). +/* No 4X status reads take longer than this (in nsec). */ -#define HP_SDC_MAX_REG_DELAY 20000 +#define HP_SDC_MAX_REG_DELAY 20000000 typedef void (hp_sdc_irqhook) (int irq, void *dev_id, uint8_t status, uint8_t data); @@ -281,7 +281,7 @@ typedef struct { hp_sdc_transaction *tq[HP_SDC_QUEUE_LEN]; /* All pending read/writes */ int rcurr, rqty; /* Current read transact in process */ - struct timeval rtv; /* Time when current read started */ + struct timespec64 rtv; /* Time when current read started */ int wcurr; /* Current write transact in process */ int dev_err; /* carries status from registration */ -- 1.9.1