linux-kernel - Re: [PATCH v2 1/4] PCI: pciehp: Add pciehp_set_indicators() to jointly set LED indicators

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Date:   Mon, 12 Aug 2019 22:40:24 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     sathyanarayanan kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc:     Denis Efremov <efremov@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] PCI: pciehp: Add pciehp_set_indicators() to
 jointly set LED indicators

On Mon, Aug 12, 2019 at 11:49:23AM -0700, sathyanarayanan kuppuswamy wrote:
> > On 8/11/19 12:59 PM, Denis Efremov wrote:
> > > +    if ((!PWR_LED(ctrl)  || pwr  == PWR_NONE) &&
> > > +        (!ATTN_LED(ctrl) || attn == ATTN_NONE))
> > > +        return;
> 
> Also I think this condition needs to expand to handle the case whether pwr
> != PWR_NONE and !PWR_LED(ctrl) is true.
> 
> you need to return for case, pwr = PWR_ON, !PWR_LED(ctrl)=true ,
> !ATTN_LED(ctrl)=false, attn=on

Why should we return in that case?  We need to update the Attention
Indicator Control to On.

Thanks,

Lukas