linux-kernel - Re: [PATCH v4] driver core: Fix device link device name collision

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Message-ID: <5d8ea5751e761df7511a3f2db4de1273@walle.cc>
Date:   Sun, 10 Jan 2021 02:52:29 +0100
From:   Michael Walle <michael@...le.cc>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>, stable@...r.kernel.org,
        kernel-team@...roid.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] driver core: Fix device link device name collision

Am 2021-01-09 23:45, schrieb Saravana Kannan:
> The device link device's name was of the form:
> <supplier-dev-name>--<consumer-dev-name>
> 
> This can cause name collision as reported here [1] as device names are
> not globally unique. Since device names have to be unique within the
> bus/class, add the bus/class name as a prefix to the device names used 
> to
> construct the device link device name.
> 
> So the devuce link device's name will be of the form:
> <supplier-bus-name>:<supplier-dev-name>--<consumer-bus-name>:<consumer-dev-name>
> 
> [1] - 
> https://lore.kernel.org/lkml/20201229033440.32142-1-michael@walle.cc/
> 
> Cc: stable@...r.kernel.org
> Fixes: 287905e68dd2 ("driver core: Expose device link details in 
> sysfs")
> Reported-by: Michael Walle <michael@...le.cc>
> Signed-off-by: Saravana Kannan <saravanak@...gle.com>

Tested-by: Michael Walle <michael@...le.cc>

Thanks!

-michael