From mboxrd@z Thu Jan 1 00:00:00 1970 From: j-keerthy@ti.com (Keerthy) Date: Tue, 19 Dec 2017 14:00:52 +0530 Subject: [PATCH 2/2] clocksource: timer-dm: Check prescaler value In-Reply-To: <20171218113153.GB18637@lenoch> References: <1513059137-21593-1-git-send-email-j-keerthy@ti.com> <20171218111610.GA16906@lenoch> <20171218113153.GB18637@lenoch> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Monday 18 December 2017 05:01 PM, Ladislav Michl wrote: > Invalid prescaler value is silently ignored. Fix that > by returning -EINVAL in such case. As invalid value > disabled use of the prescaler, use -1 explicitely for > that purpose. Thanks. I will post this as part of my migration series. > > Signed-off-by: Ladislav Michl > --- > drivers/clocksource/timer-dm.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/clocksource/timer-dm.c b/drivers/clocksource/timer-dm.c > index ec3a28c90c70..95cd98be8541 100644 > --- a/drivers/clocksource/timer-dm.c > +++ b/drivers/clocksource/timer-dm.c > @@ -609,6 +609,9 @@ static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, > if (prescaler >= 0x00 && prescaler <= 0x07) { > l |= OMAP_TIMER_CTRL_PRE; > l |= prescaler << 2; > + } else { > + if (prescaler != -1) > + return -EINVAL; > } > omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); > >