netdev - Re: [PATCH 23/28] mISDN: Fix compiler warnings

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Date:	Sat, 28 Apr 2012 12:03:16 +0200
From:	Karsten Keil <kkeil@...ux-pingi.de>
To:	David Laight <David.Laight@...LAB.COM>
CC:	Karsten Keil <isdn@...ux-pingi.de>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	isdn4linux@...tserv.isdn4linux.de
Subject: Re: [PATCH 23/28] mISDN: Fix compiler warnings

Hi David,

thanks for the review.

Am 24.04.2012 10:24, schrieb David Laight:
>  
>> diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c 
>> b/drivers/isdn/hardware/mISDN/hfcmulti.c
>> index 884c090..144c35a 100644
>> --- a/drivers/isdn/hardware/mISDN/hfcmulti.c
>> +++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
>> @@ -2456,12 +2456,12 @@ handle_timer_irq(struct hfc_multi *hc)
>>  		spin_unlock_irqrestore(&HFClock, flags);
>>  	}
>>  	if (test_bit(HFC_CHIP_2MBITRAW, &hc->chip)) {
>> -		if (hc->created[hc->chan[0].port] && hc->chan[ch].bch &&
>> +		ch = 0;
>> +		if (hc->created[hc->chan[ch].port] && 
>> hc->chan[ch].bch &&
>>  		    test_bit(FLG_ACTIVE, &hc->chan[ch].bch->Flags)) {
>>  			ch_activ++;
>> -			hfcmulti_tx(hc, 0);
>> -			hfcmulti_rx(hc, 0);
>> -			ch = 1;
>> +			hfcmulti_tx(hc, ch);
>> +			hfcmulti_rx(hc, ch);
>>  			if (hc->chan[ch].dch &&
>>  			    hc->chan[ch].nt_timer > -1) {
>>  				dch = hc->chan[ch].dch;
> 
> That seems to change the fields checked in the final 'if'.
> Not sure it is the intended behaviour.
> 

Yes it is the correct behavior, it was wrong before. If the
HFC_CHIP_2MBITRAW flag is set, only hc->chan[0] should be used.
This did not make trouble, because you normally do not use any
D-channnel in 2 MBit mode, calling the D-Channel specific functions
still makes sense for the L1 state machine, when using this
mode to emulate a E1 Layer1 tester, which was the main reson to
implement this mode.

Karsten
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