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platform/x86: intel-uncore-freq: Conditionally create attribute for read frequency
When the current uncore frequency can't be read, don't create attribute
"current_freq_khz" as any read will fail later. Some user space
applications like turbostat fail to continue with the failure. So, check
error during attribute creation.
Fixes: 414eef2728
("platform/x86/intel/uncore-freq: Display uncore current frequency")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231004181915.1887913-1-srinivas.pandruvada@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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parent
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1 changed files with 6 additions and 2 deletions
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@ -176,7 +176,7 @@ show_uncore_data(initial_max_freq_khz);
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static int create_attr_group(struct uncore_data *data, char *name)
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{
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int ret, index = 0;
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int ret, freq, index = 0;
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init_attribute_rw(max_freq_khz);
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init_attribute_rw(min_freq_khz);
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@ -197,7 +197,11 @@ static int create_attr_group(struct uncore_data *data, char *name)
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data->uncore_attrs[index++] = &data->min_freq_khz_dev_attr.attr;
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data->uncore_attrs[index++] = &data->initial_min_freq_khz_dev_attr.attr;
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data->uncore_attrs[index++] = &data->initial_max_freq_khz_dev_attr.attr;
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data->uncore_attrs[index++] = &data->current_freq_khz_dev_attr.attr;
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ret = uncore_read_freq(data, &freq);
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if (!ret)
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data->uncore_attrs[index++] = &data->current_freq_khz_dev_attr.attr;
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data->uncore_attrs[index] = NULL;
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data->uncore_attr_group.name = name;
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