On Fri, May 11, 2012 at 08:34:46PM -0000, David Daney wrote:
> From: David Daney <david.daney@xxxxxxxxxx>
>
> Add the driver, link it into the kbuild system and provide device tree
> binding documentation.
>
> Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
> Acked-by: Grant Likely <grant.likely@xxxxxxxxxxxx>
>
[ ... ]
> +
> +static int __devexit octeon_spi_remove(struct platform_device *pdev)
> +{
> + struct octeon_spi *p = platform_get_drvdata(pdev);
> + struct spi_master *master = p->my_master;
> +
> + spi_unregister_master(master);
> +
I know it is a bit late, but ...
The call to spi_unregister_master() frees the memory associated with master,
ie 'p', and the spi_master_put() below without matching spi_master_get() is
unnecessary/wrong. One possible fix would be to use
struct spi_master *master = spi_master_get(p->my_master);
above. That protects master and p while it is still being used, and makes use
of the call to spi_master_put() below. Another option might be to move
cvmx_write_csr() ahead of the call to spi_unregister_master() and drop the
call to spi_master_put().
Guenter
> + /* Clear the CSENA* and put everything in a known state. */
> + cvmx_write_csr(p->register_base + OCTEON_SPI_CFG, 0);
> + spi_master_put(master);
> + return 0;
> +}
> +
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