Re: [PATCH] Xilinx: SPI: driver not releasing memory

[David Brownell <david-b@pacbell.net>]

On Friday 06 March 2009, Grant Likely wrote:
> David,
> 
> Are you okay with this patch and okay with it going in via Ben's
> powerpc tree?  Ben wants to ensure that changes outside arch/powerpc/
> are properly acked before going into his tree.

Sure, no problem.


> Thanks,
> g.
> 
> On Sat, Feb 28, 2009 at 9:09 PM, Grant Likely <grant.likely@secretlab.ca> wrote:
> > On Fri, Feb 27, 2009 at 4:54 PM, John Linn <john.linn@xilinx.com> wrote:
> >> The driver was not releasing memory when it was removed or
> >> when there was a failure during probe. This fixes it.
> >>
> >> Signed-off-by: John Linn <john.linn@xilinx.com>
> >
> > Looks good.
> >
> > Acked-by: Grant Likely <grant.likely@secretlab.ca>

Acked-by: David Brownell <dbrownell@users.sourceforge.net>


> > I'll pick this up into my -next branch and ask Ben to pull it in the
> > next week or so.
> 
> > ---
> > This is an incremental patch to the patch (updated driver
> > for device tree) that is in the next branch.
> > ---
> >  drivers/spi/xilinx_spi.c |    9 +++++++--
> >  1 files changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
> > index fe7e5f3..494d3f7 100644
> > --- a/drivers/spi/xilinx_spi.c
> > +++ b/drivers/spi/xilinx_spi.c
> > @@ -354,7 +354,7 @@ static int __init xilinx_spi_of_probe(struct of_device *ofdev,
> >        if (xspi->regs == NULL) {
> >                rc = -ENOMEM;
> >                dev_warn(&ofdev->dev, "ioremap failure\n");
> > -               goto put_master;
> > +               goto release_mem;
> >        }
> >        xspi->irq = r_irq->start;
> >
> > @@ -365,7 +365,7 @@ static int __init xilinx_spi_of_probe(struct of_device *ofdev,
> >        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");
> > -               goto put_master;
> > +               goto unmap_io;
> >        }
> >        master->num_chipselect = *prop;
> >
> > @@ -397,6 +397,8 @@ free_irq:
> >        free_irq(xspi->irq, xspi);
> >  unmap_io:
> >        iounmap(xspi->regs);
> > +release_mem:
> > +       release_mem_region(r_mem->start, resource_size(r_mem));
> >  put_master:
> >        spi_master_put(master);
> >        return rc;
> > @@ -406,6 +408,7 @@ static int __devexit xilinx_spi_remove(struct of_device *ofdev)
> >  {
> >        struct xilinx_spi *xspi;
> >        struct spi_master *master;
> > +       struct resource r_mem;
> >
> >        master = platform_get_drvdata(ofdev);
> >        xspi = spi_master_get_devdata(master);
> > @@ -413,6 +416,8 @@ static int __devexit xilinx_spi_remove(struct of_device *ofdev)
> >        spi_bitbang_stop(&xspi->bitbang);
> >        free_irq(xspi->irq, xspi);
> >        iounmap(xspi->regs);
> > +       if (!of_address_to_resource(ofdev->node, 0, &r_mem))
> > +               release_mem_region(r_mem.start, resource_size(&r_mem));
> >        dev_set_drvdata(&ofdev->dev, 0);
> >        spi_master_put(xspi->bitbang.master);
> >
> > --
> > 1.5.3.4
> >
> >
> >
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> >
> >
> >
> 
> 
> 
> -- 
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.
> 
>