linux-kernel - Re: [PATCH v6 4/5] iwlwifi: convert to use driver data API

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Date:   Fri, 28 Apr 2017 15:17:37 +0300
From:   Luca Coelho <luca@...lho.fi>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     gregkh@...uxfoundation.org, wagi@...om.org, dwmw2@...radead.org,
        rafal@...ecki.pl, arend.vanspriel@...adcom.com, rjw@...ysocki.net,
        yi1.li@...ux.intel.com, atull@...nsource.altera.com,
        moritz.fischer@...us.com, pmladek@...e.com,
        johannes.berg@...el.com, emmanuel.grumbach@...el.com,
        kvalo@...eaurora.org, luto@...nel.org, takahiro.akashi@...aro.org,
        dhowells@...hat.com, pjones@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 4/5] iwlwifi: convert to use driver data API

On Fri, 2017-04-28 at 02:56 +0200, Luis R. Rodriguez wrote:
> On Mon, Apr 10, 2017 at 04:19:12PM +0300, Luca Coelho wrote:
> > On Wed, 2017-03-29 at 20:25 -0700, Luis R. Rodriguez wrote:
> > > The driver data API provides support for looking for firmware
> > > from a specific set of API ranges, so just use that. Since we
> > > free the firmware on the callback immediately after consuming it,
> > > this also takes avantage of that feature.
> > > 
> > > Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
> > > ---
> > 
> > Looks fine, with one nitpick.
> > 
> > 
> > >  drivers/net/wireless/intel/iwlwifi/iwl-drv.c | 67 ++++++++++------------------
> > >  1 file changed, 23 insertions(+), 44 deletions(-)
> > > 
> > > diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
> > > index be466a074c1d..b6643aa5b344 100644
> > > --- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
> > > +++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
> > 
> > [...]
> > 
> > > @@ -1541,11 +1522,9 @@ struct iwl_drv *iwl_drv_start(struct iwl_trans *trans)
> > >  	}
> > >  #endif
> > >  
> > > -	ret = iwl_request_firmware(drv, true);
> > > -	if (ret) {
> > > -		IWL_ERR(trans, "Couldn't request the fw\n");
> > > +	ret = iwl_request_firmware(drv);
> > > +	if (ret)
> > >  		goto err_fw;
> > > -	}
> > 
> > Why remove the error message here?
> 
> The driver data API now has enough semantics even for async requests so that
> an error is either always issued or supressed (optional is true), driver errors
> then are superfluous on error now.
> 
> Let me know if this is OK.

Yeah, that's okay.  We can always add something back if we think it's
needed.

--
Cheers,
Luca.