linux-kernel - Re: [PATCH v5 1/2] spi: add support for DLN-2 USB-SPI adapter

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Date:	Wed, 19 Nov 2014 16:12:40 +0200
From:	Laurentiu Palcu <laurentiu.palcu@...el.com>
To:	Johan Hovold <johan@...nel.org>
Cc:	Mark Brown <broonie@...nel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Octavian Purdila <octavian.purdila@...el.com>,
	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/2] spi: add support for DLN-2 USB-SPI adapter

On Wed, Nov 19, 2014 at 02:51:21PM +0100, Johan Hovold wrote:
> On Wed, Nov 19, 2014 at 03:07:47PM +0200, Laurentiu Palcu wrote:
> 
> > +/*
> > + * Perform one read operation.
> > + */
> > +static int dln2_spi_read_one(struct dln2_spi *dln2, u8 *data,
> > +			     u16 data_len, u8 attr)
> > +{
> > +	int ret;
> > +	struct {
> > +		u8 port;
> > +		__le16 size;
> > +		u8 attr;
> > +	} __packed tx;
> > +	struct {
> > +		__le16 size;
> > +		u8 buf[DLN2_SPI_MAX_XFER_SIZE];
> > +	} __packed *rx = dln2->buf;
> 
> You said you verified that the dln2 protocol headers did not mess up the
> alignment, yet they do. Here you have a two byte header.
I did, only that I mistakenly counted the entire header, including
dln2_response struct size, which is 10 bytes... :/

thanks,
laurentiu

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