linux-kernel - Re: [PATCH] i2c: i2c-cros-ec-tunnel: Fix slave device enumeration

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Date:   Mon, 25 Nov 2019 16:32:35 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Akshu Agrawal <akshu.agrawal@....com>
Cc:     rrangel@...omium.org, Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Neil Armstrong <narmstrong@...libre.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        "open list:I2C SUBSYSTEM HOST DRIVERS" <linux-i2c@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i2c: i2c-cros-ec-tunnel: Fix slave device enumeration

Hi Akshu,

On 21/11/19 10:06, Akshu Agrawal wrote:
> During adding of the adapter the slave device registration
> use to fail as the acpi companion field was not populated.
> 

I am wondering if this a fix that needs to picked on stable kernels? Which
chrome platform are you using?

Thanks,
 Enric

> Signed-off-by: Akshu Agrawal <akshu.agrawal@....com>
> ---
>  drivers/i2c/busses/i2c-cros-ec-tunnel.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/i2c/busses/i2c-cros-ec-tunnel.c b/drivers/i2c/busses/i2c-cros-ec-tunnel.c
> index c551aa96a2e3..aca8070393bd 100644
> --- a/drivers/i2c/busses/i2c-cros-ec-tunnel.c
> +++ b/drivers/i2c/busses/i2c-cros-ec-tunnel.c
> @@ -273,6 +273,7 @@ static int ec_i2c_probe(struct platform_device *pdev)
>  	bus->adap.dev.parent = &pdev->dev;
>  	bus->adap.dev.of_node = np;
>  	bus->adap.retries = I2C_MAX_RETRIES;
> +	ACPI_COMPANION_SET(&bus->adap.dev, ACPI_COMPANION(&pdev->dev));
>  
>  	err = i2c_add_adapter(&bus->adap);
>  	if (err)
>