From: Sergei Shtylyov <sergei.shtylyov@gmail.com>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>,
linux-renesas-soc@vger.kernel.org
Cc: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>,
Alain Volmat <alain.volmat@st.com>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i2c: mark HostNotify target address as used
Date: Wed, 10 Jul 2024 12:15:18 +0300 [thread overview]
Message-ID: <c8f837f5-16b1-a5da-c687-a95d2ec42fa0@gmail.com> (raw)
In-Reply-To: <20240710085506.31267-2-wsa+renesas@sang-engineering.com>
On 7/10/24 11:55 AM, Wolfram Sang wrote:
> I2C core handles the local target for receiving HostNotify alerts. There
> is no separate driver bound to that address. That means userspace can
> access it if desired, leading to further complications if controllers
> are not capable of reading their own local target. Bind the local target
> to the dummy driver so it will marked as "handled by the kernel" if the
^ be? :-)
> HostNotify feature is used. That protects aginst userspace access and
> prevents other drivers binding to it.
>
> Fixes: 2a71593da34d ("i2c: smbus: add core function handling SMBus host-notify")
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
[...]
MBR, Sergey
next prev parent reply other threads:[~2024-07-10 9:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-10 8:55 [PATCH] i2c: mark HostNotify target address as used Wolfram Sang
2024-07-10 9:15 ` Sergei Shtylyov [this message]
2024-07-11 9:26 ` Wolfram Sang
2024-07-11 9:31 ` Wolfram Sang
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