> -----Original Message-----
> From: glik...@secretlab.ca [mailto:glik...@secretlab.ca] On Behalf Of Grant
> Likely
> Sent: Thursday, November 12, 2009 7:56 AM
> To: Richard Röjfors
> Cc: spi-devel-general@lists.sourceforge.net; linuxppc-...@ozlabs.org; Andrew
> Morton;
> dbrown...@users.sourceforge.net; John Linn
> Subject: Re: [PATCH v2 1/4] xilinx_spi: Split into of driver and generic part.
>
> On Thu, Nov 12, 2009 at 7:26 AM, Richard Röjfors
> <richard.rojf...@mocean-labs.com> wrote:
> > This patch splits the xilinx_spi driver into a generic part and a
> > OF driver part.
> >
> > The reason for this is to later add in a platform driver as well.
> >
> > Signed-off-by: Richard Röjfors <richard.rojf...@mocean-labs.com>
> > ---
<snip>
> > +
> > + if (!ofdev->dev.platform_data) {
> > + ofdev->dev.platform_data =
> > + kzalloc(sizeof(struct xspi_platform_data),
> > GFP_KERNEL);
> > + if (!ofdev->dev.platform_data)
> > + return -ENOMEM;
> > + }
>
> Minor memory leak. Anything alloced in the probe path should also be
> freed in the remove path. It's not going to spiral out of control or
> anything, but it is important to be strict about such things. Drop
> the outer if{} block here and kfree platform_data on remove.
>
> > +
> > + /* number of slave select bits is required */
> > + prop = of_get_property(ofdev->node, "xlnx,num-ss-bits", &len);
> > + if (!prop || len < sizeof(*prop)) {
> > + dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
> > + return -EINVAL;
> > + }
> > + ofdev->dev.platform_data->num_chipselect = *prop;
>
> Have you compile tested this? platform_data is a void*, the
> dereference will not work. I know you don't have hardware; but
> getting the needed cross compiler is easy.
Here's the fixes I did to make it compile. On to testing :)
Thanks,
John
diff --git a/drivers/spi/xilinx_spi_of.c b/drivers/spi/xilinx_spi_of.c
index 13e1591..2dea9f3 100644
--- a/drivers/spi/xilinx_spi_of.c
+++ b/drivers/spi/xilinx_spi_of.c
@@ -39,6 +39,7 @@
static int __init xilinx_spi_of_probe(struct of_device *ofdev,
const struct of_device_id *match)
{
+ struct xspi_platform_data *pdata = ofdev->dev.platform_data;
struct resource r_irq_struct;
struct resource r_mem_struct;
struct spi_master *master;
@@ -74,8 +75,8 @@ static int __init xilinx_spi_of_probe(struct of_device *ofdev,
dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
return -EINVAL;
}
- ofdev->dev.platform_data->num_chipselect = *prop;
- ofdev->dev.platform_data->bits_per_word = 8;
+ pdata->num_chipselect = *prop;
+ pdata->bits_per_word = 8;
master = xilinx_spi_init(&ofdev->dev, r_mem, r_irq->start, -1);
if (!master)
return -ENODEV;
>
> > + master = xilinx_spi_init(&ofdev->dev, r_mem, r_irq->start, -1);
> > + if (!master)
> > + return -ENODEV;
> > +
> > + dev_set_drvdata(&ofdev->dev, master);
> > +
> > + /* Add any subnodes on the SPI bus */
> > + of_register_spi_devices(master, ofdev->node);
> > +
> > + return 0;
> > +}
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