linux-kernel - Re: [PATCH] Lattice ECP3 FPGA: Correct endianness

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Date:	Fri, 4 Jul 2014 15:11:42 +0200
From:	Jean-Michel Hautbois <jean-michel.hautbois@...alys.com>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, sr@...x.de
Subject: Re: [PATCH] Lattice ECP3 FPGA: Correct endianness

2014-07-03 18:12 GMT+02:00 Joe Perches <joe@...ches.com>:
>
> On Thu, 2014-07-03 at 17:54 +0200, Jean-Michel Hautbois wrote:
> > This patch corrects three big/little endian issues. Tested on i.MX6.
>
> trivial:
>
> > diff --git a/drivers/misc/lattice-ecp3-config.c
> []
> > @@ -165,8 +165,8 @@ static void firmware_load(const struct firmware
> > *fw, void *context)
> >
> >      txbuf[0] = FPGA_CMD_READ_STATUS;
> >      ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len);
> > -    dev_dbg(&spi->dev, "FPGA Status=%08x\n", *(u32 *)&rxbuf[4]);
> > -    status = *(u32 *)&rxbuf[4];
> > +    dev_dbg(&spi->dev, "FPGA Status=%08x\n", be32_to_cpu(*(u32 *)&rxbuf[4]));
> > +    status = be32_to_cpu(*(u32 *)&rxbuf[4]);
>
> This should emit a sparse error.
> It'd be simpler as:
>
>         status = be32_to_cpu(*(__be32 *)&rxbuf[4]);
>         dev_dbg(&spi->dev, "FPGA Status=%08x\n", status);
>
>

OK, do you want me to send a new patch including this modification ?


JM
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