From: Larry Finger <Larry.Finger@lwfinger.net>
To: htl10@users.sourceforge.net
Cc: "John W. Linville" <linville@tuxdriver.com>,
Serafeim Zanikolas <sez@debian.org>,
herton@mandriva.com.br, joe@perches.com, davem@davemloft.net,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drivers: rtl818x: request DMA-able memory
Date: Mon, 25 Oct 2010 13:01:25 -0500 [thread overview]
Message-ID: <4CC5C5F5.3080607@lwfinger.net> (raw)
In-Reply-To: <902045.66378.qm@web29504.mail.ird.yahoo.com>
On 10/25/2010 10:39 AM, Hin-Tak Leung wrote:
>
> okay - sorry about the confusion - I was grep'ing for GFP_DMA and only b43/b43lagacy have it and it is relatively rare. AFAIK none of the rtl8187 devices are non-USB... probably a NACK then, but I should ask Serafeim if there is a reason for him to submit this patch? (other than "it says dma"...)
There are some devices driven by b43/b43legacy that implement only 24-bit DMA.
For that reason, they need to allocate DMA buffers in the low 16 MB of RAM. For
rtl8187, that consideration does not apply.
Larry
WARNING: multiple messages have this Message-ID (diff)
From: Larry Finger <Larry.Finger-tQ5ms3gMjBLk1uMJSBkQmQ@public.gmane.org>
To: htl10-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: "John W. Linville"
<linville-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org>,
Serafeim Zanikolas <sez-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>,
herton-4qZELD6Fgxg39yzSjRtAkw@public.gmane.org,
joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org,
davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org,
linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH] drivers: rtl818x: request DMA-able memory
Date: Mon, 25 Oct 2010 13:01:25 -0500 [thread overview]
Message-ID: <4CC5C5F5.3080607@lwfinger.net> (raw)
In-Reply-To: <902045.66378.qm-gyycVyw5OoDyX4RqAA4FmIglqE1Y4D90QQ4Iyu8u01E@public.gmane.org>
On 10/25/2010 10:39 AM, Hin-Tak Leung wrote:
>
> okay - sorry about the confusion - I was grep'ing for GFP_DMA and only b43/b43lagacy have it and it is relatively rare. AFAIK none of the rtl8187 devices are non-USB... probably a NACK then, but I should ask Serafeim if there is a reason for him to submit this patch? (other than "it says dma"...)
There are some devices driven by b43/b43legacy that implement only 24-bit DMA.
For that reason, they need to allocate DMA buffers in the low 16 MB of RAM. For
rtl8187, that consideration does not apply.
Larry
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next prev parent reply other threads:[~2010-10-25 18:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-24 20:32 [PATCH] drivers: rtl818x: request DMA-able memory Serafeim Zanikolas
2010-10-25 13:24 ` Larry Finger
2010-10-25 14:11 ` Hin-Tak Leung
2010-10-25 14:22 ` John W. Linville
2010-10-25 15:39 ` Hin-Tak Leung
2010-10-25 18:01 ` Larry Finger [this message]
2010-10-25 18:01 ` Larry Finger
2010-10-25 17:44 ` Serafeim Zanikolas
2010-10-25 14:23 ` Johannes Berg
2010-10-25 13:35 ` John W. Linville
-- strict thread matches above, loose matches on Subject: below --
2010-10-24 20:32 Serafeim Zanikolas
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