From: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
To: Daniel Ribeiro <drwyrm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Stefan Schmidt <stefan-4Bgg8jF3iZdg9hUCZPvPmw@public.gmane.org>,
eric.y.miao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
sameo-RWuK6r/cQWRpLGFMi4vTTA@public.gmane.org,
linux-arm-kernel-xIg/pKzrS19vn6HldHNs0ANdhmdF6hFW@public.gmane.org,
Stefan Schmidt
<stefan-OrPQZGeq07wqhVmZOOOmNx2eb7JE58TQ@public.gmane.org>
Subject: Re: [patch 05/14] mfd: PCAP2 driver
Date: Sun, 23 Nov 2008 00:26:10 -0800 [thread overview]
Message-ID: <200811230026.11126.david-b@pacbell.net> (raw)
In-Reply-To: <1227423962.3148.74.camel@brutus>
On Saturday 22 November 2008, Daniel Ribeiro wrote:
> Can you be more descriptive on "address the DMA"? Im not familiar on
> what is the issue here.
You may not pass stack based buffers -- as you're now doing -- for
the spi_transfer buffers. Documentation/DMA-mapping.txt is very
clear that such buffers are not DMA-safe, and the SPI kerneldoc is
just as clear that spi_transfer.{tx,rx}_buf memory must be DMA-safe.
- Dave
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
prev parent reply other threads:[~2008-11-23 8:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20081121160403.073751031@dodger.lab.datenfreihafen.org>
2008-11-21 16:04 ` [patch 05/14] mfd: PCAP2 driver stefan-OrPQZGeq07wqhVmZOOOmNx2eb7JE58TQ
[not found] ` <20081121160521.016544616-cQQG9CVUopzFITZdfPi31ZcF1vblOVnWhIvA6WVW+J8@public.gmane.org>
2008-11-22 5:25 ` David Brownell
2008-11-22 14:01 ` [spi-devel-general] " Eric Miao
[not found] ` <f17812d70811220601p1d7af668mf3265224179753ab-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-11-22 15:54 ` Daniel Ribeiro
2008-11-22 19:08 ` David Brownell
[not found] ` <200811221108.54331.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-22 23:29 ` Stefan Schmidt
[not found] ` <200811212125.49068.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-22 17:12 ` Daniel Ribeiro
2008-11-22 19:19 ` David Brownell
[not found] ` <200811221119.27981.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-22 23:33 ` Stefan Schmidt
[not found] ` <20081122233356.GC24437-OrPQZGeq07wqhVmZOOOmNx2eb7JE58TQ@public.gmane.org>
2008-11-22 23:58 ` David Brownell
[not found] ` <200811221558.03915.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-23 0:33 ` Stefan Schmidt
[not found] ` <20081123003306.GE24437-OrPQZGeq07wqhVmZOOOmNx2eb7JE58TQ@public.gmane.org>
2008-11-23 2:19 ` David Brownell
[not found] ` <200811221819.53186.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-23 3:38 ` Daniel Ribeiro
2008-11-23 4:59 ` David Brownell
[not found] ` <200811222059.59806.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-23 7:06 ` Daniel Ribeiro
2008-11-23 8:26 ` David Brownell [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200811230026.11126.david-b@pacbell.net \
--to=david-b-ybekhbn/0ldr7s880joybq@public.gmane.org \
--cc=dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
--cc=drwyrm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=eric.y.miao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=linux-arm-kernel-xIg/pKzrS19vn6HldHNs0ANdhmdF6hFW@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=sameo-RWuK6r/cQWRpLGFMi4vTTA@public.gmane.org \
--cc=spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
--cc=stefan-4Bgg8jF3iZdg9hUCZPvPmw@public.gmane.org \
--cc=stefan-OrPQZGeq07wqhVmZOOOmNx2eb7JE58TQ@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).