Re: [PATCH 2/3] i2c: core: Dispose OF IRQ mapping at client removal time

From: Thierry Reding
Date: Thu Oct 30 2014 - 10:25:56 EST


On Thu, Oct 30, 2014 at 03:59:37PM +0200, Laurent Pinchart wrote:
> Clients instantiated from OF get an IRQ mapping created at device
> registration time. Dispose the mapping when the client is removed.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> ---
> drivers/i2c/i2c-core.c | 3 +++
> 1 file changed, 3 insertions(+)

If this is needed regardless of patch 3/3, then presumably it should be
Cc'ed to stable@xxxxxxxxxxxxxxx since it fixes a bug that's been there
for quite some time?

Thierry

> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index 2f90ac6a7f79..258765b29684 100644
> --- a/drivers/i2c/i2c-core.c
> +++ b/drivers/i2c/i2c-core.c
> @@ -670,6 +670,9 @@ static int i2c_device_remove(struct device *dev)
> status = driver->remove(client);
> }
>
> + if (dev->of_node)
> + irq_dispose_mapping(client->irq);
> +
> dev_pm_domain_detach(&client->dev, true);
> return status;
> }
> --
> 2.0.4
>

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