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From: Wolfram Sang <wsa@the-dreams.de>
To: Mark Brown <broonie@kernel.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>,
	Baolin Wang <baolin.wang@linaro.org>,
	linux-i2c@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: I2C PM overhaul needed? (Re: [PATCH 1/2] i2c: sprd: Prevent i2c accesses after suspend is called)
Date: Sat, 5 May 2018 10:32:55 +0200	[thread overview]
Message-ID: <20180505083255.7gv3bcjxx3b6nzeb@ninjato> (raw)
In-Reply-To: <20180505015458.GM13402@sirena.org.uk>

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Hi Mark,

> > And maybe this could be used here, too? Introduce this flag for very
> > late/early messages. If they have it, messages are even sent in
> > suspend_noirq() phase with the master_xfer_irqless() callback, otherwise
> > we will have the WARNing printed out.
> 
> It feels like it'd be more elegant to have the core select the irqless
> function automatically if called after interrupts have been disabled -
> otherwise we end up with the need to special case through other layers
> of the stack like regmap as well which seems like it'd be error prone.

Yes, I was concerned about thae (i.e. regmap accessors), too.

> OTOH it does mean we might not notice things happening later than they
> should so it's not 100% clear...

What do you mean here?

Thanks,

   Wolfram


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  reply	other threads:[~2018-05-05  8:32 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-09  6:40 [PATCH 1/2] i2c: sprd: Prevent i2c accesses after suspend is called Baolin Wang
2018-04-09  6:40 ` [PATCH 2/2] i2c: sprd: Fix the i2c count issue Baolin Wang
2018-04-27 12:14   ` Wolfram Sang
2018-04-09 20:56 ` [PATCH 1/2] i2c: sprd: Prevent i2c accesses after suspend is called Grygorii Strashko
2018-04-10  8:08   ` Baolin Wang
2018-04-27 12:14 ` Wolfram Sang
2018-05-02  3:27   ` Baolin Wang
2018-05-02  5:23     ` Wolfram Sang
2018-05-02  5:48       ` Baolin Wang
2018-05-03 16:26         ` Grygorii Strashko
2018-05-04 12:24           ` I2C PM overhaul needed? (Re: [PATCH 1/2] i2c: sprd: Prevent i2c accesses after suspend is called) Wolfram Sang
2018-05-05  1:54             ` Mark Brown
2018-05-05  8:32               ` Wolfram Sang [this message]
2018-05-09  8:18                 ` Mark Brown
2018-05-07 17:48             ` Grygorii Strashko
2018-05-08 16:32               ` Wolfram Sang
2018-05-08 18:31                 ` Peter Rosin
2018-05-11 15:14                 ` Grygorii Strashko

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