linux-kernel - Re: [PATCH 2/2] dma/amba-pl08x: add support for the Nomadik variant

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Message-ID: <CACRpkdaz9g7cRc1rAMHUzRbLcrYtB-kPCB6bFEMYZxxmWfLNSg@mail.gmail.com>
Date:	Wed, 11 Apr 2012 09:59:25 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Viresh Kumar <viresh.kumar@...com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dan Williams <dan.j.williams@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Russell King <linux@....linux.org.uk>,
	Alim Akhtar <alim.akhtar@...il.com>
Subject: Re: [PATCH 2/2] dma/amba-pl08x: add support for the Nomadik variant

On Tue, Apr 10, 2012 at 5:43 AM, Viresh Kumar <viresh.kumar@...com> wrote:
> On 4/10/2012 2:23 AM, Linus Walleij wrote:

>> +                     val = readl(ch->base + PL080_CH_CONFIG);
>> +                     if (val & (PL080N_CONFIG_ITPROT | PL080N_CONFIG_SECPROT)) {
>> +                             dev_info(&adev->dev, "physical channel %d reserved "
>> +                                      "for secure access only\n", i);
>
> Better not to break the print string. Go beyond 80 columns.

OK

>> +                             ch->locked = true;
>> +                     } else
>> +                             ch->locked = false;
>> +             }
>> +
>
> Memory for ch is allocated with kmalloc and so its default value is garbage.
> So we must set locked to false in else part here.

Hm maybe better to kzalloc() the channel structs?

>> @@ -2036,9 +2069,9 @@ static struct amba_id pl08x_ids[] = {
>>       },
>>       /* Nomadik 8815 PL080 variant */
>>       {
>> -             .id     = 0x00280880,
>> +             .id     = 0x00280080,
>
> Has this changed? How it worked earlier?

Never worked until now. It was based on incorrect data sheets...

I'll send a V2 ASAP.

Yours,
Linus Walleij
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