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 11:37:58 +0900 [thread overview]
Message-ID: <20180626023757.l54suaryim2fieq3@ninjato> (raw)
In-Reply-To: <20180620085157.30121-2-peda@axentia.se>
> This is not perfectly equivalent, since i2c_smbus_xfer was callable from
> atomic/irq context if you happened to end up emulating SMBus with an I2C
> transfer, and that is no longer the case with this patch. It is unknown
> (to me) if anything depends on that quirk, but it seems fragile enough to
> simply break those cases and require them to call i2c_transfer directly
> instead.
Couldn't we just add the same trylock-code path here as well? I always
wondered why I2C and SMBus were not in sync when it came to that. Yet, I
didn't want to change the code for no reason, but it seems we now have
one?
Rest of the series looks good to me, very nice diffstat!
next prev parent reply other threads:[~2018-06-26 2:38 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 [this message]
2018-06-26 11:54 ` Peter Rosin
2018-06-26 13:46 ` Wolfram Sang
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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