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platform/x86/intel/tpmi: Don't create devices for disabled features

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If some TPMI features are disabled, don't create auxiliary devices. In
this way feature drivers will not load.

While creating auxiliary devices, call tpmi_read_feature_status() to
check feature state and return if the feature is disabled without
creating a device.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231204221740.3645130-2-srinivas.pandruvada@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Srinivas Pandruvada 2023-12-04 14:17:36 -08:00 committed by Hans de Goede
parent 7973be9472
commit b87434f2e6
1 changed files with 13 additions and 1 deletions
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14
drivers/platform/x86/intel/tpmi.c
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@ -598,9 +598,21 @@ static int tpmi_create_device(struct intel_tpmi_info *tpmi_info,
struct intel_vsec_device *vsec_dev = tpmi_info->vsec_dev;
char feature_id_name[TPMI_FEATURE_NAME_LEN];
struct intel_vsec_device *feature_vsec_dev;
struct tpmi_feature_state feature_state;
struct resource *res, *tmp;
const char *name;
int i;
int i, ret;
ret = tpmi_read_feature_status(tpmi_info, pfs->pfs_header.tpmi_id, &feature_state);
if (ret)
return ret;
/*
* If not enabled, continue to look at other features in the PFS, so return -EOPNOTSUPP.
* This will not cause failure of loading of this driver.
*/
if (!feature_state.enabled)
return -EOPNOTSUPP;
name = intel_tpmi_name(pfs->pfs_header.tpmi_id);
if (!name)