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From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: Gaurav Kohli <gkohli@codeaurora.org>, linux-kernel@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH v2] nvmem: core: Set no-read-write provider to avoid userspace read/write
Date: Wed, 20 Mar 2019 14:34:25 +0000	[thread overview]
Message-ID: <48a71861-c60b-7fe7-d4af-5269cd7c20eb@linaro.org> (raw)
In-Reply-To: <1552831940-7327-1-git-send-email-gkohli@codeaurora.org>



On 17/03/2019 14:12, Gaurav Kohli wrote:
> Current nvmem framework allows user space to read all register space
> populated by nvmem binary file, In case we don't want to expose value
> of registers to userspace and only want kernel space to read cell
> value from nvmem_cell_read_u32.
> 
> To protect the same, Add no-read-write property to prevent read
> from userspace.
> 

Can you explain the real need of this?
Is there any issue you are noticing while reading nvmem content from 
userspace?

I don't think this is the right way to do this, its misleading in many 
ways. Also this should not be a part of DT binding.

If we decide that we need this feature, then better way to do this using 
a new Kernel config.

thanks,
srini

  reply	other threads:[~2019-03-20 14:34 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-17 14:12 [PATCH v2] nvmem: core: Set no-read-write provider to avoid userspace read/write Gaurav Kohli
2019-03-20 14:34 ` Srinivas Kandagatla [this message]
2019-03-20 15:50   ` Gaurav Kohli
2019-03-20 16:26     ` Srinivas Kandagatla
2019-03-20 17:50       ` Gaurav Kohli
2019-03-21 13:14         ` Marc Gonzalez
2019-03-22 15:02         ` Srinivas Kandagatla
2019-03-22 18:12           ` Gaurav Kohli
2019-03-25  6:15             ` Gaurav Kohli
2019-04-01  4:52               ` Gaurav Kohli
2019-04-02  7:35           ` Niklas Cassel

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