netdev - Re: [PATCH 1/2] iwlwifi: use pci

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Date:	Fri, 24 Jun 2011 08:21:40 -0700
From:	wwguy <wey-yi.w.guy@...el.com>
To:	Sergei Shtylyov <sshtylyov@...sta.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linville@...driver.com" <linville@...driver.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"ilw@...ux.intel.com" <ilw@...ux.intel.com>
Subject: Re: [PATCH 1/2] iwlwifi: use pci_dev->revision, again

On Fri, 2011-06-24 at 07:37 -0700, Sergei Shtylyov wrote:
> Hello.
> 
> wwguy wrote:
> 
> >>>> Commit ff938e43d39e926de74b32a3656c190f979ab642 (net: use pci_dev->revision,
> >>>> again) already converted this driver to using the 'revision' field of 'struct
> >>>> pci_dev' but commit c2974a1d18832a9fffb2eb389c3878f5c4ed92f1 (iwlagn: remove
> >>>> rev_id) later reverted that change for no reason. Now restore the change...
> >>>> Signed-off-by: Sergei Shtylyov<sshtylyov@...mvista.com>
> >>>> ---
> >>>> The patch is against the recent Linus' tree.
> >>>>   drivers/net/wireless/iwlwifi/iwl-agn.c |    5 ++---
> >>>>   1 file changed, 2 insertions(+), 3 deletions(-)
> >>>> Index: linux-2.6/drivers/net/wireless/iwlwifi/iwl-agn.c
> >>>> ===================================================================
> >>>> --- linux-2.6.orig/drivers/net/wireless/iwlwifi/iwl-agn.c
> >>>> +++ linux-2.6/drivers/net/wireless/iwlwifi/iwl-agn.c
> >>>> @@ -3275,10 +3275,9 @@ struct ieee80211_ops iwlagn_hw_ops = {
> >>>>
> >>>>   static u32 iwl_hw_detect(struct iwl_priv *priv)
> >>>>   {
> >>>> -	u8 rev_id;
> >>>> +	IWL_DEBUG_INFO(priv, "HW Revision ID = 0x%X\n",
> >>>> +		       priv->pci_dev->revision);
> >>>>
> >>>> -	pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID,&rev_id);
> >>>> -	IWL_DEBUG_INFO(priv, "HW Revision ID = 0x%X\n", rev_id);
> >>>>   	return iwl_read32(priv, CSR_HW_REV);
> >>>>   }
> 
> >>> hmm, I believe it is merge sequence issue, the IWL_DEBUG_INFO line has
> >>> benn remove all together in later patch. the information is being log in
> >>> the calling function, no need to log in "iwl_hw_detect"
> 
> >>     Hm, you probably mean this patch in the iwlwifi-2.6.git (of which I wasn't 
> >> aware):
> 
> >> author	Emmanuel Grumbach <emmanuel.grumbach@...el.com>	
> >> 	Tue, 31 May 2011 06:58:18 +0000 (09:58 +0300)
> >> committer	Wey-Yi Guy <wey-yi.w.guy@...el.com>	
> >> 	Sat, 18 Jun 2011 15:18:01 +0000 (08:18 -0700)
> >> commit	85aed7c48113dfcdc913008481c46346af0db69e
> >> tree	75831a2ec540039470c295a81c2059a24a4531f5
> >> parent	19707bac16129ccebc398dbff9d2b44b17b24fea
> 
> >> iwlagn: don't read the PCI_REVISION_ID from iwl-agn.c
> 
> >> The PCI_REVISION_ID is read and printed in iwl_pci_probe anyway using pr_info
> 
> >> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
> >> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@...el.com>
> 
> >>     Since iwl_pci_probe() still reads the PCI config. register, my patch 
> >> should be recast to modify iwl-pci.c instead...
> 
> > I don't believe this patch is needed since the "log" statement is move
> > to outside the function.
> 
>     That's what I'm talking about -- it's not needed in its current form, but I 
> will redo the patch to modify iwl-pci,c where iwl_pci_probe() still reads 
> PCI_REVISION_ID.
> 

ok, thanks
Wey
> 


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