netdev - RE: [PATCH net-next v8 6/9] net: txgbe: Support GPIO to SFP socket

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Date: Tue, 16 May 2023 10:05:41 +0800
From: Jiawen Wu <jiawenwu@...stnetic.com>
To: "'Andy Shevchenko'" <andriy.shevchenko@...ux.intel.com>
Cc: <netdev@...r.kernel.org>,
	<jarkko.nikula@...ux.intel.com>,
	<mika.westerberg@...ux.intel.com>,
	<jsd@...ihalf.com>,
	<Jose.Abreu@...opsys.com>,
	<andrew@...n.ch>,
	<hkallweit1@...il.com>,
	<linux@...linux.org.uk>,
	<linux-i2c@...r.kernel.org>,
	<linux-gpio@...r.kernel.org>,
	<mengyuanlou@...-swift.com>
Subject: RE: [PATCH net-next v8 6/9] net: txgbe: Support GPIO to SFP socket

On Tuesday, May 16, 2023 5:36 AM, Andy Shevchenko wrote:
> On Mon, May 15, 2023 at 02:31:57PM +0800, Jiawen Wu wrote:
> > Register GPIO chip and handle GPIO IRQ for SFP socket.
> 
> ...
> 
> > +	spin_lock_init(&wx->gpio_lock);
> 
> Almost forgot to ask, are you planning to use this GPIO part on PREEMPT_RT
> kernels? Currently you will get a splat in case IRQ is fired.

Hmmm, I don't know much about this. Should I use raw_spinlock_t instead of
spinlock_t?