linux-kernel - Re: [PATCH] spi: spi-omap2-mcspi.c: Add dts for slave device configuration.

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Date:	Tue, 14 May 2013 12:53:31 +0300
From:	Illia Smyrnov <x0194613@...com>
To:	Matthias Brugger <matthias.bgg@...il.com>
CC:	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>, Daniel Mack <zonque@...il.com>,
	Enric Balletbo Serra <eballetbo@...il.com>,
	Javier Martinez Canillas <martinez.javier@...il.com>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<spi-devel-general@...ts.sourceforge.net>,
	<linux-omap@...r.kernel.org>, <ezequiel.garcia@...e-electrons.com>
Subject: Re: [PATCH] spi: spi-omap2-mcspi.c: Add dts for slave device configuration.


> @@ -745,6 +781,11 @@ static int omap2_mcspi_setup_transfer(struct
> spi_device *spi,
>          mcspi = spi_master_get_devdata(spi->master);
>          spi_cntrl = mcspi->master;
>
> +       if (!cd && spi->dev.of_node) {
> +               cd = omap2_mcspi_get_slave_ctrldata(spi);
 > +               spi->controller_data = cd;

Here you call omap2_mcspi_get_slave_ctrldata function that allocate 
memory for cd structure, but this memory never freed.

Also, why do you read DT data in omap2_mcspi_setup_transfer function?
Under certain conditions the omap2_mcspi_setup_transfer function may be 
calling for each transfer and each call it will check (!cd && 
spi->dev.of_node) condition.

Consider to move DT data read code from omap2_mcspi_setup_transfer to
omap2_mcspi_setup function and free spi->controller_data pointer in 
omap2_mcspi_cleanup function.

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