| Message ID | 20170628200839.3114345-1-arnd@arndb.de |
|---|---|
| State | New |
| Headers | show |
On 06/28/2017 01:07 PM, Arnd Bergmann wrote: > gcc warns about an unused variable in the new driver: > > drivers/rtc/rtc-brcmstb-waketimer.c: In function 'brcmstb_waketmr_settime': > drivers/rtc/rtc-brcmstb-waketimer.c:142:6: error: unused variable 'ret' [-Werror=unused-variable] > > The same function also doesn't handle overflow correctly, this makes > it return -EINVAL when passed a time that doesn't fit within the > range of the register. Yes, thanks for doing that. > > Fixes: 9f4ad359c801 ("rtc: brcmstb-waketimer: Add Broadcom STB wake-timer") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> -- Florian
Hi, On 28/06/2017 at 22:07:34 +0200, Arnd Bergmann wrote: > gcc warns about an unused variable in the new driver: > > drivers/rtc/rtc-brcmstb-waketimer.c: In function 'brcmstb_waketmr_settime': > drivers/rtc/rtc-brcmstb-waketimer.c:142:6: error: unused variable 'ret' [-Werror=unused-variable] > > The same function also doesn't handle overflow correctly, this makes > it return -EINVAL when passed a time that doesn't fit within the > range of the register. > > Fixes: 9f4ad359c801 ("rtc: brcmstb-waketimer: Add Broadcom STB wake-timer") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > drivers/rtc/rtc-brcmstb-waketimer.c | 19 ++++++++++++------- > 1 file changed, 12 insertions(+), 7 deletions(-) > I've squashed it in the original commit, I hope this is fine for you. > diff --git a/drivers/rtc/rtc-brcmstb-waketimer.c b/drivers/rtc/rtc-brcmstb-waketimer.c > index 5dea6d0627d8..796ac792a381 100644 > --- a/drivers/rtc/rtc-brcmstb-waketimer.c > +++ b/drivers/rtc/rtc-brcmstb-waketimer.c > @@ -138,10 +138,12 @@ static int brcmstb_waketmr_settime(struct device *dev, > struct rtc_time *tm) > { > struct brcmstb_waketmr *timer = dev_get_drvdata(dev); > - unsigned long sec; > - int ret; > + time64_t sec; > + > + sec = rtc_tm_to_time64(tm); > > - rtc_tm_to_time(tm, &sec); > + if (sec > U32_MAX || sec < 0) > + return -EINVAL; > > writel_relaxed(sec, timer->base + BRCMSTB_WKTMR_COUNTER); > > @@ -152,14 +154,14 @@ static int brcmstb_waketmr_getalarm(struct device *dev, > struct rtc_wkalrm *alarm) > { > struct brcmstb_waketmr *timer = dev_get_drvdata(dev); > - unsigned long sec; > + time64_t sec; > u32 reg; > > sec = readl_relaxed(timer->base + BRCMSTB_WKTMR_ALARM); > if (sec != 0) { > /* Alarm is enabled */ > alarm->enabled = 1; > - rtc_time_to_tm(sec, &alarm->time); > + rtc_time64_to_tm(sec, &alarm->time); > } > > reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT); > @@ -172,13 +174,16 @@ static int brcmstb_waketmr_setalarm(struct device *dev, > struct rtc_wkalrm *alarm) > { > struct brcmstb_waketmr *timer = dev_get_drvdata(dev); > - unsigned long sec; > + time64_t sec; > > if (alarm->enabled) > - rtc_tm_to_time(&alarm->time, &sec); > + sec = rtc_tm_to_time64(&alarm->time); > else > sec = 0; > > + if (sec > U32_MAX || sec < 0) > + return -EINVAL; > + > brcmstb_waketmr_set_alarm(timer, sec); > > return 0; > -- > 2.9.0 > -- Alexandre Belloni, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
On 07/05/2017 02:13 PM, Alexandre Belloni wrote: > Hi, > > On 28/06/2017 at 22:07:34 +0200, Arnd Bergmann wrote: >> gcc warns about an unused variable in the new driver: >> >> drivers/rtc/rtc-brcmstb-waketimer.c: In function 'brcmstb_waketmr_settime': >> drivers/rtc/rtc-brcmstb-waketimer.c:142:6: error: unused variable 'ret' [-Werror=unused-variable] >> >> The same function also doesn't handle overflow correctly, this makes >> it return -EINVAL when passed a time that doesn't fit within the >> range of the register. >> >> Fixes: 9f4ad359c801 ("rtc: brcmstb-waketimer: Add Broadcom STB wake-timer") >> Signed-off-by: Arnd Bergmann <arnd@arndb.de> >> --- >> drivers/rtc/rtc-brcmstb-waketimer.c | 19 ++++++++++++------- >> 1 file changed, 12 insertions(+), 7 deletions(-) >> > > I've squashed it in the original commit, I hope this is fine for you. Works for me, thanks Alexandre! -- Florian
diff --git a/drivers/rtc/rtc-brcmstb-waketimer.c b/drivers/rtc/rtc-brcmstb-waketimer.c index 5dea6d0627d8..796ac792a381 100644 --- a/drivers/rtc/rtc-brcmstb-waketimer.c +++ b/drivers/rtc/rtc-brcmstb-waketimer.c @@ -138,10 +138,12 @@ static int brcmstb_waketmr_settime(struct device *dev, struct rtc_time *tm) { struct brcmstb_waketmr *timer = dev_get_drvdata(dev); - unsigned long sec; - int ret; + time64_t sec; + + sec = rtc_tm_to_time64(tm); - rtc_tm_to_time(tm, &sec); + if (sec > U32_MAX || sec < 0) + return -EINVAL; writel_relaxed(sec, timer->base + BRCMSTB_WKTMR_COUNTER); @@ -152,14 +154,14 @@ static int brcmstb_waketmr_getalarm(struct device *dev, struct rtc_wkalrm *alarm) { struct brcmstb_waketmr *timer = dev_get_drvdata(dev); - unsigned long sec; + time64_t sec; u32 reg; sec = readl_relaxed(timer->base + BRCMSTB_WKTMR_ALARM); if (sec != 0) { /* Alarm is enabled */ alarm->enabled = 1; - rtc_time_to_tm(sec, &alarm->time); + rtc_time64_to_tm(sec, &alarm->time); } reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT); @@ -172,13 +174,16 @@ static int brcmstb_waketmr_setalarm(struct device *dev, struct rtc_wkalrm *alarm) { struct brcmstb_waketmr *timer = dev_get_drvdata(dev); - unsigned long sec; + time64_t sec; if (alarm->enabled) - rtc_tm_to_time(&alarm->time, &sec); + sec = rtc_tm_to_time64(&alarm->time); else sec = 0; + if (sec > U32_MAX || sec < 0) + return -EINVAL; + brcmstb_waketmr_set_alarm(timer, sec); return 0;
gcc warns about an unused variable in the new driver: drivers/rtc/rtc-brcmstb-waketimer.c: In function 'brcmstb_waketmr_settime': drivers/rtc/rtc-brcmstb-waketimer.c:142:6: error: unused variable 'ret' [-Werror=unused-variable] The same function also doesn't handle overflow correctly, this makes it return -EINVAL when passed a time that doesn't fit within the range of the register. Fixes: 9f4ad359c801 ("rtc: brcmstb-waketimer: Add Broadcom STB wake-timer") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- drivers/rtc/rtc-brcmstb-waketimer.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) -- 2.9.0