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Message-ID: <20091022010137.GB21723@tux1.beaverton.ibm.com> Date: Wed, 21 Oct 2009 18:01:37 -0700 From: "Darrick J. Wong" <djwong@...ibm.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-acpi@...r.kernel.org, lm-sensors@...sensors.org, linux-kernel@...r.kernel.org Subject: [PATCH] acpi_power_meter: Don't leak ACPI error codes to userspace acpi-power-meter: Don't leak ACPI error codes to userspace If the ACPI methods return an error code, we must return -EINVAL to userspace to flag the error. Right now we pass the (positive) number right through, which causes echo to keep writing bogus values. Signed-off-by: Darrick J. Wong <djwong@...ibm.com> --- drivers/acpi/power_meter.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/acpi/power_meter.c b/drivers/acpi/power_meter.c index e6bfd77..2ef7030 100644 --- a/drivers/acpi/power_meter.c +++ b/drivers/acpi/power_meter.c @@ -294,7 +294,11 @@ static int set_acpi_trip(struct acpi_power_meter_resource *resource) return -EINVAL; } - return data; + /* _PTP returns 0 on success, nonzero otherwise */ + if (data) + return -EINVAL; + + return 0; } static ssize_t set_trip(struct device *dev, struct device_attribute *devattr, -- 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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