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authorWEN Pingbo <pingbo.wen@linaro.org>2018-01-01 21:31:18 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2018-01-01 21:39:12 -0800
commit59d805af417809820ed54a8a02525b03bc74d62a (patch)
tree1ea557337b5ef184836304e4f45490bed46bf21b /drivers/input/serio
parentac45e6293f3074dc6ccf984e210c8793796eaf28 (diff)
downloadlinux-59d805af417809820ed54a8a02525b03bc74d62a.tar.bz2
Input: hil_mlc - convert timeval to jiffies
struct timeval is not y2038 safe, and what mlc->instart do is scheduling a task in a fixed timeout, so jiffies is the simplest choice here. In hilse_donode(), the expires in mod_timer equals jiffies + intimeout - (now - instart) If we use jiffies in 'now', the expires equals instart + intimeout So, all we need to do is that making sure expires is a future timestamp before passed it to mod_timer. [arnd: slightly simplified patch further] Link: https://lists.linaro.org/pipermail/y2038/2015-October/000937.html Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Patchwork-Id: 10076615 Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/serio')
-rw-r--r--drivers/input/serio/hil_mlc.c18
-rw-r--r--drivers/input/serio/hp_sdc_mlc.c5
2 files changed, 8 insertions, 15 deletions
diff --git a/drivers/input/serio/hil_mlc.c b/drivers/input/serio/hil_mlc.c
index 581e47119363..e1423f7648d6 100644
--- a/drivers/input/serio/hil_mlc.c
+++ b/drivers/input/serio/hil_mlc.c
@@ -602,8 +602,8 @@ static inline void hilse_setup_input(hil_mlc *mlc, const struct hilse_node *node
BUG();
}
mlc->istarted = 1;
- mlc->intimeout = node->arg;
- do_gettimeofday(&(mlc->instart));
+ mlc->intimeout = usecs_to_jiffies(node->arg);
+ mlc->instart = jiffies;
mlc->icount = 15;
memset(mlc->ipacket, 0, 16 * sizeof(hil_packet));
BUG_ON(down_trylock(&mlc->isem));
@@ -708,7 +708,7 @@ static int hilse_donode(hil_mlc *mlc)
break;
}
mlc->ostarted = 0;
- do_gettimeofday(&(mlc->instart));
+ mlc->instart = jiffies;
write_unlock_irqrestore(&mlc->lock, flags);
nextidx = HILSEN_NEXT;
break;
@@ -729,18 +729,14 @@ static int hilse_donode(hil_mlc *mlc)
#endif
while (nextidx & HILSEN_SCHED) {
- struct timeval tv;
+ unsigned long now = jiffies;
if (!sched_long)
goto sched;
- do_gettimeofday(&tv);
- tv.tv_usec += USEC_PER_SEC * (tv.tv_sec - mlc->instart.tv_sec);
- tv.tv_usec -= mlc->instart.tv_usec;
- if (tv.tv_usec >= mlc->intimeout) goto sched;
- tv.tv_usec = (mlc->intimeout - tv.tv_usec) * HZ / USEC_PER_SEC;
- if (!tv.tv_usec) goto sched;
- mod_timer(&hil_mlcs_kicker, jiffies + tv.tv_usec);
+ if (time_after(now, mlc->instart + mlc->intimeout))
+ goto sched;
+ mod_timer(&hil_mlcs_kicker, mlc->instart + mlc->intimeout);
break;
sched:
tasklet_schedule(&hil_mlcs_tasklet);
diff --git a/drivers/input/serio/hp_sdc_mlc.c b/drivers/input/serio/hp_sdc_mlc.c
index d50f0678bf47..232d30c825bd 100644
--- a/drivers/input/serio/hp_sdc_mlc.c
+++ b/drivers/input/serio/hp_sdc_mlc.c
@@ -149,7 +149,6 @@ static int hp_sdc_mlc_in(hil_mlc *mlc, suseconds_t timeout)
/* Try to down the semaphore */
if (down_trylock(&mlc->isem)) {
- struct timeval tv;
if (priv->emtestmode) {
mlc->ipacket[0] =
HIL_ERR_INT | (mlc->opacket &
@@ -160,9 +159,7 @@ static int hp_sdc_mlc_in(hil_mlc *mlc, suseconds_t timeout)
/* printk(KERN_DEBUG PREFIX ">[%x]\n", mlc->ipacket[0]); */
goto wasup;
}
- do_gettimeofday(&tv);
- tv.tv_usec += USEC_PER_SEC * (tv.tv_sec - mlc->instart.tv_sec);
- if (tv.tv_usec - mlc->instart.tv_usec > mlc->intimeout) {
+ if (time_after(jiffies, mlc->instart + mlc->intimeout)) {
/* printk("!%i %i",
tv.tv_usec - mlc->instart.tv_usec,
mlc->intimeout);