linux-kernel - Re: [PATCH net] net: fec: don't save PTP state if PTP is unsupported

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Message-ID: <e08f9ba0-66f3-488a-a6cc-b087527b2cb9@roeck-us.net>
Date: Wed, 9 Oct 2024 10:19:52 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Wei Fang <wei.fang@....com>, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, richardcochran@...il.com,
 csokas.bence@...lan.hu, shenwei.wang@....com, xiaoning.wang@....com
Cc: imx@...ts.linux.dev, netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: fec: don't save PTP state if PTP is unsupported

On 10/7/24 23:11, Wei Fang wrote:
> Some platforms (such as i.MX25 and i.MX27) do not support PTP, so on
> these platforms fec_ptp_init() is not called and the related members
> in fep are not initialized. However, fec_ptp_save_state() is called
> unconditionally, which causes the kernel to panic. Therefore, add a
> condition so that fec_ptp_save_state() is not called if PTP is not
> supported.
> 
> Fixes: a1477dc87dc4 ("net: fec: Restart PPS after link state change")
> Reported-by: Guenter Roeck <linux@...ck-us.net>
> Closes: https://lore.kernel.org/lkml/353e41fe-6bb4-4ee9-9980-2da2a9c1c508@roeck-us.net/
> Signed-off-by: Wei Fang <wei.fang@....com>

Tested-by: Guenter Roeck <linux@...ck-us.net>