linux-kernel - Re: [PATCH v6 2/2] staging: ion: create one device entry per heap

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Message-ID: <20171024161444.GA14939@jcrouse-lnx.qualcomm.com>
Date:   Tue, 24 Oct 2017 10:14:44 -0600
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>
Cc:     labbott@...hat.com, sumit.semwal@...aro.org,
        gregkh@...uxfoundation.org, arve@...roid.com,
        riandrews@...roid.com, broonie@...nel.org,
        dan.carpenter@...cle.com, devel@...verdev.osuosl.org,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v6 2/2] staging: ion: create one device entry per heap

On Mon, Oct 23, 2017 at 05:55:37PM +0200, Benjamin Gaignard wrote:
> Instead a getting only one common device "/dev/ion" for
> all the heaps this patch allow to create one device
> entry ("/dev/ionX") per heap.
> Getting an entry per heap could allow to set security rules
> per heap and global ones for all heaps.
> 
> Allocation requests will be only allowed if the mask_id
> match with device minor.
> Query request could be done on any of the devices.
> 
> Ion devices are parentless so it is need to add platform_bus as
> parent and platform_bus_type as bus to be put in /sys/device/paltform.

nit: paltform -> platform.

Jordan

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