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From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: Weird/Unneeded call to msleep in exynos_mipi_dsi_wr_data in exynos_mipi_dsi_common.c
Date: Thu, 18 Dec 2014 14:05:01 +0000	[thread overview]
Message-ID: <5492DF0D.3080607@ti.com> (raw)
In-Reply-To: <5492DB1A.2020704@gmail.com>

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On 18/12/14 15:48, nick wrote:
> Lucas,
> That's fair do you known of anyone who does have the hardware so we can test my patch. If you do then we can get this fixed rather
> easily.
> Cheers Nick 
> 
> On 2014-12-18 08:39 AM, Lucas Stach wrote:
>> Am Donnerstag, den 18.12.2014, 08:35 -0500 schrieb nick:
>>> Krzysztof,
>>> If we look at the code for this function, it already is handling the data correctly. In addition  the locks 
>>> seem to be better protection then msleep. Further more is no reason for this delay as we are neither resetting 
>>> the hardware or waiting for the hardware here so why is it needed? I don't have Exynos based hardware lying
>>> around through to test it.
>>
>> If you can't test it, don't touch it. It's that simple.

There seems to be multiple msleep(20)s in exynos_mipi_dsi_common.c, a
few with /* FIXME */ and a few without any comments. Looks like bad (but
relatively harmless) code to me, but as Lucas said, if you can't test
it, don't touch it.

 Tomi



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      parent reply	other threads:[~2014-12-18 14:05 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <54920A54.2060608@gmail.com>
2014-12-18 10:26 ` Weird/Unneeded call to msleep in exynos_mipi_dsi_wr_data in exynos_mipi_dsi_common.c Krzysztof Kozłowski
     [not found]   ` <5492D80E.3010906@gmail.com>
2014-12-18 13:39     ` Lucas Stach
     [not found]       ` <5492DB1A.2020704@gmail.com>
2014-12-18 14:05         ` Tomi Valkeinen [this message]

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