Re: [PATCH] platform/x86: think-lmi: Keep pending save state on failure

[Thorsten Blum <thorsten.blum@linux.dev>]

On Tue, Aug 11, 2026 at 03:29:16PM -0400, Mark Pearson wrote:
> Hi Thorsten,
> 
> On Mon, Aug 10, 2026, at 8:08 AM, Thorsten Blum wrote:
> > In save_settings_store(), the opcode and legacy password paths do not
> > check if saving BIOS settings failed, but instead unconditionally clear
> > save_required and set reboot_required, losing the pending save state.
> >
> > Check the save result in those paths too.
> >
> > Fixes: 318d97849fc2 ("platform/x86: think-lmi: Add bulk save feature")
> > Cc: stable@vger.kernel.org
> > Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
> > ---
> >  drivers/platform/x86/lenovo/think-lmi.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/platform/x86/lenovo/think-lmi.c 
> > b/drivers/platform/x86/lenovo/think-lmi.c
> > index e215e86e3db7..cc0a85d1b832 100644
> > --- a/drivers/platform/x86/lenovo/think-lmi.c
> > +++ b/drivers/platform/x86/lenovo/think-lmi.c
> > @@ -1347,6 +1347,8 @@ static ssize_t save_settings_store(struct kobject 
> > *kobj, struct kobj_attribute *
> >  					goto out;
> >  			}
> >  			ret = tlmi_save_bios_settings("");
> > +			if (ret)
> > +				goto out;
> >  		} else { /* old non-opcode based authentication method (deprecated) 
> > */
> >  			if (tlmi_priv.pwd_admin->pwd_enabled && 
> > tlmi_priv.pwd_admin->password[0]) {
> >  				auth_str = kasprintf(GFP_KERNEL, "%s,%s,%s;",
> > @@ -1363,6 +1365,8 @@ static ssize_t save_settings_store(struct kobject 
> > *kobj, struct kobj_attribute *
> >  				ret = tlmi_save_bios_settings(auth_str);
> >  			else
> >  				ret = tlmi_save_bios_settings("");
> > +			if (ret)
> > +				goto out;
> >  		}
> >  		tlmi_priv.save_required = false;
> >  		tlmi_priv.reboot_required = true;
> 
> Curious - have you actually hit this condition?

No, I was just reading the code and wondered why those return values
aren't checked for errors.