linux-kernel - Re: [PATCH] phy: mdio_bus: Check ENOTSUPP instead of ENOSYS in mdiobus_register

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Message-ID: <3435da8a-6942-d292-c901-df1bd7fb5d94@xilinx.com>
Date:   Wed, 20 Nov 2019 07:47:45 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Michal Simek <michal.simek@...inx.com>,
        linux-kernel@...r.kernel.org, monstr@...str.eu, git@...inx.com
Cc:     Andrew Lunn <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] phy: mdio_bus: Check ENOTSUPP instead of ENOSYS in
 mdiobus_register_reset

On 19. 11. 19 19:04, Florian Fainelli wrote:
> On 11/19/19 5:27 AM, Michal Simek wrote:
>> Origin patch was using ENOTSUPP instead of ENOSYS. Silently changing error
>> value ends up in an access to bad area on Microblaze with axi ethernet
>> driver.
>>
>> Fixes: 1d4639567d97 ("mdio_bus: Fix PTR_ERR applied after initialization to constant")
>> Signed-off-by: Michal Simek <michal.simek@...inx.com>
> 
> This has been fixed in the "net" tree already:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=075e238d12c21c8bde700d21fb48be7a3aa80194
> 

Works for me.

Thanks,
Michal