linux-kernel - Re: [PATCH] driver for the ARM PL080/PL081 PrimeCells v5

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Message-ID: <AANLkTi=cvg6YKaEqOOCjBu2gc__k7470t1rdF9gvBsR4@mail.gmail.com>
Date:	Thu, 30 Sep 2010 00:39:41 +0200
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	linux-kernel@...r.kernel.org, Peter Pearse <peter.pearse@....com>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Alessandro Rubini <rubini@...pv.it>
Subject: Re: [PATCH] driver for the ARM PL080/PL081 PrimeCells v5

2010/9/29 Dan Williams <dan.j.williams@...el.com>:
> [Me]
>> +/*
>> + * Initialize a descriptor to be used by memcpy submit
>> + */
>> +static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
>> +               struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
>> +               size_t len, unsigned long flags)
>> +{
>> +       struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
>> +       struct pl08x_driver_data *pl08x = plchan->host;
>> +       struct pl08x_txd *txd;
>> +       int ret;
>> +
>> +       txd = kzalloc(sizeof(struct pl08x_txd), GFP_KERNEL);
>> +       if (!txd) {
>> +               dev_err(&pl08x->adev->dev,
>> +                       "%s no memory for descriptor\n", __func__);
>> +               return NULL;
>> +       }
>
> With your acknowledgment I'll append a patch to convert this to
> GFP_NOWAIT because device_prep_dma_memcpy() is meant to be callable
> from atomic contexts.

Damn typically I forgot something. Please go ahead with this!
Acked-by: Linus Walleij <linus.walleij@...ricsson.com>

Yours,
Linus Walleij
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