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platform/x86/intel-uncore-freq: Return error on write frequency

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commit 75e406b540 upstream.

Currently when the uncore_write() returns error, it is silently
ignored. Return error to user space when uncore_write() fails.

Fixes: 49a474c7ba ("platform/x86: Add support for Uncore frequency control")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Wendy Wang <wendy.wang@intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230418153230.679094-1-srinivas.pandruvada@linux.intel.com
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivas Pandruvada
2023-04-18 08:32:30 -07:00
committed by Greg Kroah-Hartman
parent 9a4a8c3294
commit 7fa87de520
1 changed files with 5 additions and 1 deletions
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6
drivers/platform/x86/intel/uncore-frequency/uncore-frequency-common.c
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@@ -44,14 +44,18 @@ static ssize_t store_min_max_freq_khz(struct uncore_data *data,
int min_max)
{
unsigned int input;
int ret;
if (kstrtouint(buf, 10, &input))
return -EINVAL;
mutex_lock(&uncore_lock);
uncore_write(data, input, min_max);
ret = uncore_write(data, input, min_max);
mutex_unlock(&uncore_lock);
if (ret)
return ret;
return count;
}