From: Ian Abbott <abbotti@mev.co.uk>
To: Dan Carpenter <dan.carpenter@oracle.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-staging@lists.linux.dev,
H Hartley Sweeten <hsweeten@visionengravers.com>,
"Spencer E . Olson" <olsonse@umich.edu>
Subject: Re: [PATCH 0/5] staging: comedi: tests: Fix various issues
Date: Wed, 14 Apr 2021 13:40:34 +0100 [thread overview]
Message-ID: <87e957d3-12b8-bac8-b1a3-ea10abee4ef5@mev.co.uk> (raw)
In-Reply-To: <20210414100905.GD6048@kadam>
On 14/04/2021 11:09, Dan Carpenter wrote:
> This driver is doing a bunch of DMA on stack which doesn't work on
> all architectures. You have to use kmalloc() (or vmalloc() I suppose)
> memory for DMA.
>
> drivers/staging/comedi/drivers/dt9812.c:249 dt9812_read_info() error: doing dma on the stack (&cmd)
> drivers/staging/comedi/drivers/dt9812.c:273 dt9812_read_multiple_registers() error: doing dma on the stack (&cmd)
> drivers/staging/comedi/drivers/dt9812.c:299 dt9812_write_multiple_registers() error: doing dma on the stack (&cmd)
> drivers/staging/comedi/drivers/dt9812.c:318 dt9812_rmw_multiple_registers() error: doing dma on the stack (&cmd)
> drivers/staging/comedi/drivers/dt9812.c:330 dt9812_digital_in() error: doing dma on the stack (value)
> drivers/staging/comedi/drivers/dt9812.c:456 dt9812_analog_in() error: doing dma on the stack (val)
> drivers/staging/comedi/drivers/dt9812.c:692 dt9812_reset_device() error: doing dma on the stack (&tmp8)
> drivers/staging/comedi/drivers/dt9812.c:700 dt9812_reset_device() error: doing dma on the stack (&tmp8)
> drivers/staging/comedi/drivers/dt9812.c:711 dt9812_reset_device() error: doing dma on the stack (&tmp16)
> drivers/staging/comedi/drivers/dt9812.c:718 dt9812_reset_device() error: doing dma on the stack (&tmp16)
> drivers/staging/comedi/drivers/dt9812.c:725 dt9812_reset_device() error: doing dma on the stack (&tmp16)
> drivers/staging/comedi/drivers/dt9812.c:732 dt9812_reset_device() error: doing dma on the stack (&tmp32)
Yes, it seems it requires a bit of an overhaul!
--
-=( Ian Abbott <abbotti@mev.co.uk> || MEV Ltd. is a company )=-
-=( registered in England & Wales. Regd. number: 02862268. )=-
-=( Regd. addr.: S11 & 12 Building 67, Europa Business Park, )=-
-=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=-
next prev parent reply other threads:[~2021-04-14 12:46 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-07 14:01 [PATCH 0/5] staging: comedi: tests: Fix various issues Ian Abbott
2021-04-07 14:01 ` [PATCH 1/5] staging: comedi: tests: ni_routes_test: Fix compilation error Ian Abbott
2021-04-07 14:01 ` [PATCH 2/5] staging: comedi: tests: ni_routes_test: Put complex values in parentheses Ian Abbott
2021-04-07 14:01 ` [PATCH 3/5] staging: comedi: tests: ni_routes_test: Avoid CamelCase: <RVi> Ian Abbott
2021-04-07 15:23 ` Spencer Olson
2021-04-07 14:01 ` [PATCH 4/5] staging: comedi: tests: ni_routes_test: Lines should not end with a '(' Ian Abbott
2021-04-07 14:01 ` [PATCH 5/5] staging: comedi: tests: Correct unittest_fptr Ian Abbott
2021-04-07 15:10 ` [PATCH 0/5] staging: comedi: tests: Fix various issues Greg Kroah-Hartman
2021-04-07 15:39 ` Ian Abbott
2021-04-07 15:48 ` Spencer Olson
2021-04-07 16:16 ` Ian Abbott
2021-04-07 17:26 ` Greg Kroah-Hartman
2021-04-07 18:20 ` Ian Abbott
2021-04-08 7:27 ` Greg Kroah-Hartman
2021-04-14 10:09 ` Dan Carpenter
2021-04-14 10:40 ` Ian Abbott
2021-04-14 12:34 ` Ian Abbott
2021-04-14 13:28 ` Dan Carpenter
2021-04-14 13:57 ` Spencer Olson
2021-04-14 17:24 ` Ian Abbott
2021-04-14 14:29 ` Spencer Olson
2021-04-14 17:05 ` Ian Abbott
2021-04-15 9:57 ` Ian Abbott
2021-04-14 12:40 ` Ian Abbott [this message]
2021-04-14 13:12 ` Greg Kroah-Hartman
2021-04-14 13:30 ` Dan Carpenter
2021-04-07 15:43 ` Spencer Olson
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=87e957d3-12b8-bac8-b1a3-ea10abee4ef5@mev.co.uk \
--to=abbotti@mev.co.uk \
--cc=dan.carpenter@oracle.com \
--cc=gregkh@linuxfoundation.org \
--cc=hsweeten@visionengravers.com \
--cc=linux-staging@lists.linux.dev \
--cc=olsonse@umich.edu \
/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).