From: Alexander Gordeev <lasaine@lvk.cs.msu.su>
To: Tirumala Marri <tmarri@apm.com>
Cc: Mark Miesfeld <mmiesfeld@apm.com>,
greg@kroah.com, linux-usb@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, Fushen Chen <fchen@apm.com>
Subject: Re: [PATCH V8 03/10] USB/ppc4xx: Add Synopsys DWC OTG Core Interface Layer
Date: Tue, 8 Feb 2011 03:19:25 +0300 [thread overview]
Message-ID: <20110208031925.60bd1118@apollo.gnet> (raw)
In-Reply-To: <4d3a1de3bf1ff8a4f69bf2d90da0a1cf@mail.gmail.com>
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В Mon, 7 Feb 2011 10:53:25 -0800
Tirumala Marri <tmarri@apm.com> пишет:
> dwc_read_reg32 is used nowhere throughout the code. One of dwc_read32 and
> dwc_read_reg32 should be removed IMO. There was once only dwc_read_reg32. In
> version 5 of your patchset I believe. Why did you add another function?
> AFAIK it is not correct to store pointers in u32 because they need 8 bytes
> on 64-bit archs. So it was ok with the old dwc_read_reg32.
> [Marri] If u32 is 8bytes isn't pointer type would be 8bytes as well.
Sorry, I don't understand that. I think u32 is always 32bit = 4byte on
all archs. Right?
> I had change the API to avoid type castings to register addresses.
IMO it's now much worse because you pass a u32 value and cast it
internally to a pointer. I think it's unsafe and counter-intuitive. BTW
what is the problem with type casting to register addresses that you
mention? I've checked version 5 of your patchset (which is the last
version where the old API is used) and there are no casts.
--
Alexander
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next prev parent reply other threads:[~2011-02-08 0:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-19 22:57 [PATCH V8 03/10] USB/ppc4xx: Add Synopsys DWC OTG Core Interface Layer tmarri
2011-01-26 16:17 ` Alexander Gordeev
2011-01-26 16:35 ` [PATCH V8 03/10] USB/ppc4xx: Add Synopsys DWC OTG CoreInterface Layer David Laight
2011-01-26 17:35 ` Alexander Gordeev
2011-02-07 18:45 ` Tirumala Marri
2011-02-07 18:53 ` [PATCH V8 03/10] USB/ppc4xx: Add Synopsys DWC OTG Core Interface Layer Tirumala Marri
2011-02-08 0:19 ` Alexander Gordeev [this message]
2011-02-08 1:30 ` Greg KH
2011-02-11 18:33 ` Tirumala Marri
2011-02-14 8:53 ` [PATCH V8 03/10] USB/ppc4xx: Add Synopsys DWC OTG Core InterfaceLayer David Laight
2011-02-14 11:34 ` Alexander Gordeev
2011-02-15 1:04 ` Greg KH
2011-02-08 8:58 ` David Laight
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