linux-kernel - Re: [PATCH v7 00/24] i2c mux cleanup and locking update

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Date:	Thu, 21 Apr 2016 15:33:26 +0300
From:	Crestez Dan Leonard <leonard.crestez@...el.com>
To:	Peter Rosin <peda@...ntia.se>, linux-kernel@...r.kernel.org
Cc:	Wolfram Sang <wsa@...-dreams.de>, Jonathan Corbet <corbet@....net>,
	Peter Korsgaard <peter.korsgaard@...co.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jonathan Cameron <jic23@...nel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Antti Palosaari <crope@....fi>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Rob Herring <robh+dt@...nel.org>,
	Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kalle Valo <kvalo@...eaurora.org>,
	Jiri Slaby <jslaby@...e.com>,
	Daniel Baluta <daniel.baluta@...el.com>,
	Lucas De Marchi <lucas.demarchi@...el.com>,
	Adriana Reus <adriana.reus@...el.com>,
	Matt Ranostay <matt.ranostay@...el.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Terry Heo <terryheo@...gle.com>, Arnd Bergmann <arnd@...db.de>,
	Tommi Rantala <tt.rantala@...il.com>,
	linux-i2c@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-iio@...r.kernel.org, linux-media@...r.kernel.org,
	devicetree@...r.kernel.org, Peter Rosin <peda@...ator.liu.se>
Subject: Re: [PATCH v7 00/24] i2c mux cleanup and locking update

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.