From: Greg KH <gregkh@linuxfoundation.org>
To: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
arnd@arndb.de, jic23@cam.ac.uk
Subject: Re: Issue with porting i2c driver to k3.10 (iio)
Date: Thu, 4 Jul 2013 09:19:11 -0700 [thread overview]
Message-ID: <20130704161911.GC20907@kroah.com> (raw)
In-Reply-To: <CAGH3droX_J9JJ60EP6d62Sh6MK6T5WvYTq+uwcmJkwb0c1Yurg@mail.gmail.com>
On Thu, Jul 04, 2013 at 04:16:43PM +0300, Oleksandr Kravchenko wrote:
> Hi All,
>
> I wrote i2c driver for APDS-9300 light sensor in drivers/misc, but I have some
> questions regarding upstreaming of it.
> 1. It works properly in kernel-3.4, but it works very slow in kernel-3.10 (on
> mutex and i2c operations, particulary on mutex_lock() and i2c_smbus_read_data
> ()). Does anyone know why this issue may be occurred?
What is "slow"? Have you run 'perf' on the driver to see where it is
spending time?
> 2. Can I send this driver without using Industrial I/O framework?
No, why would you even want to?
greg k-h
next prev parent reply other threads:[~2013-07-04 16:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-04 13:16 Issue with porting i2c driver to k3.10 (iio) Oleksandr Kravchenko
2013-07-04 16:19 ` Greg KH [this message]
2013-07-06 11:47 ` Jonathan Cameron
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