linux-kernel - Re: [PATCH v2 02/16] bus: mhi: core: Add support for registering MHI controllers

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Message-ID: <20200206165606.GA3894455@kroah.com>
Date:   Thu, 6 Feb 2020 17:56:06 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     arnd@...db.de, smohanad@...eaurora.org, jhugo@...eaurora.org,
        kvalo@...eaurora.org, bjorn.andersson@...aro.org,
        hemantk@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/16] bus: mhi: core: Add support for registering MHI
 controllers

On Fri, Jan 31, 2020 at 07:19:55PM +0530, Manivannan Sadhasivam wrote:
> +static void mhi_release_device(struct device *dev)
> +{
> +	struct mhi_device *mhi_dev = to_mhi_device(dev);
> +
> +	if (mhi_dev->ul_chan)
> +		mhi_dev->ul_chan->mhi_dev = NULL;

That looks really odd.  Why didn't you just drop the reference you
should have grabbed here for this pointer?  You did properly increment
it when you saved it, right?  :)

> +
> +	if (mhi_dev->dl_chan)
> +		mhi_dev->dl_chan->mhi_dev = NULL;

Same here.

thanks,

greg k-h