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Message-ID: <64bf2456-e1cb-3b4a-af19-454cf0bb86aa@kernel.org>
Date:   Fri, 13 Jan 2023 16:25:20 +0200
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Subject: Re: [PATCH net-next] net: ethernet: ti: am65-cpsw/cpts: Fix CPTS
 release action
To:     Siddharth Vadapalli <s-vadapalli@ti.com>, davem@davemloft.net,
        edumazet@google.com, kuba@kernel.org, linux@armlinux.org.uk,
        pabeni@redhat.com
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, vigneshr@ti.com, srk@ti.com
References: <20230113104816.132815-1-s-vadapalli@ti.com>
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From:   Roger Quadros <rogerq@kernel.org>
In-Reply-To: <20230113104816.132815-1-s-vadapalli@ti.com>
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On 13/01/2023 12:48, Siddharth Vadapalli wrote:
> The am65_cpts_release() function is registered as a devm_action in the
> am65_cpts_create() function in am65-cpts driver. When the am65-cpsw driver
> invokes am65_cpts_create(), am65_cpts_release() is added in the set of devm
> actions associated with the am65-cpsw driver's device.
> 
> In the event of probe failure or probe deferral, the platform_drv_probe()
> function invokes dev_pm_domain_detach() which powers off the CPSW and the
> CPSW's CPTS hardware, both of which share the same power domain. Since the
> am65_cpts_disable() function invoked by the am65_cpts_release() function
> attempts to reset the CPTS hardware by writing to its registers, the CPTS
> hardware is assumed to be powered on at this point. However, the hardware
> is powered off before the devm actions are executed.
> 
> Fix this by getting rid of the devm action for am65_cpts_release() and
> invoking it directly on the cleanup and exit paths.
> 
> Fixes: f6bd59526ca5 ("net: ethernet: ti: introduce am654 common platform time sync driver")
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>

Reviewed-by: Roger Quadros <rogerq@kernel.org>

cheers,
-roger