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From: Crestez Dan Leonard <leonard.crestez@intel.com>
Subject: Re: [PATCH v7 00/24] i2c mux cleanup and locking update
To: Peter Rosin <peda@axentia.se>, linux-kernel@vger.kernel.org
References: <1461165484-2314-1-git-send-email-peda@axentia.se>
Cc: Wolfram Sang <wsa@the-dreams.de>, Jonathan Corbet <corbet@lwn.net>,
 Peter Korsgaard <peter.korsgaard@barco.com>,
 Guenter Roeck <linux@roeck-us.net>, Jonathan Cameron <jic23@kernel.org>,
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 Peter Meerwald <pmeerw@pmeerw.net>, Antti Palosaari <crope@iki.fi>,
 Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
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 "David S. Miller" <davem@davemloft.net>,
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 linux-i2c@vger.kernel.org, linux-doc@vger.kernel.org,
 linux-iio@vger.kernel.org, linux-media@vger.kernel.org,
 devicetree@vger.kernel.org, Peter Rosin <peda@lysator.liu.se>
Message-ID: <5718C896.9070302@intel.com>
Date: Thu, 21 Apr 2016 15:33:26 +0300
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On 04/20/2016 06:17 PM, Peter Rosin wrote:
> v7 compared to v6:
> - Removed i2c_mux_reserve_adapters, and all realloc attempts in
>   i2c_mux_add_adapter. Supply a maximum number of adapters in i2c_mux_alloc
>   instead.
> - Removed i2c_mux_one_adapter since it is was hard to use correctly, which
>   was evident from the crash in the mpu6050 driver (on a mpu9150 chip) reported
>   by Crestez Dan Leonard. Also, it didn't make things all that much simpler
>   anyway (even if used correctly).
> - Rename i2c_mux_core:adapters into i2c_mux_core:num_adapters.
> - Some grammar and spelling fixes.

I tested this new version on mpu9150 and there are no more obvious
deadlocks or crashes. The magnetometer and accel/gyro can be used at the
same time without issues.