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From: Wolfram Sang <wsa@the-dreams.de>
To: Peter Rosin <peda@axentia.se>
Cc: linux-kernel@vger.kernel.org,
	Vadim Pasternak <vadimp@mellanox.com>,
	Michael Shych <michaelsh@mellanox.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Akinobu Mita <akinobu.mita@gmail.com>,
	Jean Delvare <jdelvare@suse.com>,
	linux-i2c@vger.kernel.org
Subject: Re: [PATCH 1/5] i2c: smbus: add unlocked __i2c_smbus_xfer variant
Date: Tue, 26 Jun 2018 17:46:07 +0400	[thread overview]
Message-ID: <20180626134606.h4ciolw23t6qnrjb@ninjato> (raw)
In-Reply-To: <79E4A06C-26EF-4FF4-AFEA-7E7769FDF995@axentia.se>

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> I don't think it's that easy as I just thought about another problem
> with lifting the locking from the emulation function. It calls
> kzalloc(..., GFP_KERNEL), at least in some cases, and that's not a
> very good idea from atomic/irq context...

Right. However, we could simply bail out early when we are in atomic
context. Simply no DMA then...


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  reply	other threads:[~2018-06-26 13:46 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-20  8:51 [PATCH 0/5] i2c: smbus: add unlocked __i2c_smbus_xfer variant Peter Rosin
2018-06-20  8:51 ` [PATCH 1/5] " Peter Rosin
2018-06-26  2:37   ` Wolfram Sang
2018-06-26 11:54     ` Peter Rosin
2018-06-26 13:46       ` Wolfram Sang [this message]
2018-06-27  4:18         ` Peter Rosin
2018-06-27  7:08           ` Wolfram Sang
2018-07-01 12:13             ` Wolfram Sang
2018-07-01 16:40               ` Peter Rosin
2018-06-20  8:51 ` [PATCH 2/5] i2c: mux: mlxcpld: make use of __i2c_smbus_xfer Peter Rosin
2018-06-20  9:11   ` Michael Shych
2018-06-20  8:51 ` [PATCH 3/5] i2c: mux: pca9541: " Peter Rosin
2018-06-20  8:51 ` [PATCH 4/5] i2c: mux: pca954x: " Peter Rosin
2018-06-20  8:51 ` [PATCH 5/5] i2c: mux: " Peter Rosin
2018-07-03 21:01 ` [PATCH 0/5] i2c: smbus: add unlocked __i2c_smbus_xfer variant Wolfram Sang

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