diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2021-06-22 15:07:54 -0500 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-06-28 11:34:44 +0200 |
| commit | 1bcad8e510b27ad843315ab2c27ccf459e3acded (patch) | |
| tree | e6728c0defae4e27ab7e91bb55a9919b5c54b597 /drivers/platform/x86/think-lmi.c | |
| parent | 71d69e82f4168713afd89804d6e5f52d0e3848a2 (diff) | |
| download | linux-stable-1bcad8e510b27ad843315ab2c27ccf459e3acded.tar.gz linux-stable-1bcad8e510b27ad843315ab2c27ccf459e3acded.tar.bz2 linux-stable-1bcad8e510b27ad843315ab2c27ccf459e3acded.zip | |
platform/x86: think-lmi: Fix issues with duplicate attributes
On an AMD based Lenovo T14, I find that the module doesn't work at
all, and instead has a traceback with messages like:
```
sysfs: cannot create duplicate filename '/devices/virtual/firmware-attributes/thinklmi/attributes/Reserved'
```
Duplicate and reserved values showing up appear to be a firmware bug,
but they shouldn't make the driver explode. So catch them and skip
them.
Fixes: a40cd7ef22fb ("platform/x86: think-lmi: Add WMI interface support on Lenovo platforms")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20210622200755.12379-2-mario.limonciello@amd.com
[hdegoede@redhat.com: Add missing kfree(tlmi_priv.setting[i])]
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/think-lmi.c')
| -rw-r--r-- | drivers/platform/x86/think-lmi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c index b57061079288..bbfcaf23d420 100644 --- a/drivers/platform/x86/think-lmi.c +++ b/drivers/platform/x86/think-lmi.c @@ -691,6 +691,17 @@ static int tlmi_sysfs_init(void) if (!tlmi_priv.setting[i]) continue; + /* check for duplicate or reserved values */ + if (kset_find_obj(tlmi_priv.attribute_kset, tlmi_priv.setting[i]->display_name) || + !strcmp(tlmi_priv.setting[i]->display_name, "Reserved")) { + pr_debug("duplicate or reserved attribute name found - %s\n", + tlmi_priv.setting[i]->display_name); + kfree(tlmi_priv.setting[i]->possible_values); + kfree(tlmi_priv.setting[i]); + tlmi_priv.setting[i] = NULL; + continue; + } + /* Build attribute */ tlmi_priv.setting[i]->kobj.kset = tlmi_priv.attribute_kset; ret = kobject_init_and_add(&tlmi_priv.setting[i]->kobj, &tlmi_attr_setting_ktype, |