linux-kernel - Re: [ 046/167] [PATCH] spi: Fix device unregistration when unregistering the bus master

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Message-ID: <20120509193335.GD15527@herton-ThinkPad-T420>
Date:	Wed, 9 May 2012 12:33:37 -0700
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [ 046/167] [PATCH] spi: Fix device unregistration when
 unregistering the bus master

On Wed, May 09, 2012 at 06:51:15AM +0100, Ben Hutchings wrote:
> 3.2-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> 
> commit 178db7d30f94707efca1a189753c105ef69942ed upstream.

After applying this change, this introduces a bug on spi-fsl-spi.c, we
need to apply in addition to this change commit
5039a86973cd35bdb2f64d28ee12f13fe2bb5a4c

> 
> Device are added as children of the bus master's parent device, but
> spi_unregister_master() looks for devices to unregister in the bus
> master's children. This results in the child devices not being
> unregistered.
> 
> Fix this by registering devices as direct children of the bus master.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
> Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
> ---
>  drivers/spi/spi.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 77eae99..b2ccdea 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -319,7 +319,7 @@ struct spi_device *spi_alloc_device(struct spi_master *master)
>  	}
>  
>  	spi->master = master;
> -	spi->dev.parent = dev;
> +	spi->dev.parent = &master->dev;
>  	spi->dev.bus = &spi_bus_type;
>  	spi->dev.release = spidev_release;
>  	device_initialize(&spi->dev);
> -- 
> 1.7.10
> 
> 
> 
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