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Date: Mon, 15 Sep 2014 15:09:12 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Axel Lin <axel.lin@...ics.com>, Guenter Roeck <linux@...ck-us.net>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.13 142/187] hwmon: (gpio-fan) Prevent overflow problem when writing large limits 3.13.11.7 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Axel Lin <axel.lin@...ics.com> commit 2565fb05d1e9fc0831f7b1c083bcfcb1cba1f020 upstream. On platforms with sizeof(int) < sizeof(unsigned long), writing a rpm value larger than MAXINT will result in unpredictable limit values written to the chip. Avoid auto-conversion from unsigned long to int to fix the problem. Signed-off-by: Axel Lin <axel.lin@...ics.com> Signed-off-by: Guenter Roeck <linux@...ck-us.net> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- drivers/hwmon/gpio-fan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c index 73181be..814f7ee 100644 --- a/drivers/hwmon/gpio-fan.c +++ b/drivers/hwmon/gpio-fan.c @@ -173,7 +173,7 @@ static int get_fan_speed_index(struct gpio_fan_data *fan_data) return -ENODEV; } -static int rpm_to_speed_index(struct gpio_fan_data *fan_data, int rpm) +static int rpm_to_speed_index(struct gpio_fan_data *fan_data, unsigned long rpm) { struct gpio_fan_speed *speed = fan_data->speed; int i; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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