From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Anup Patel <anup.patel@broadcom.com>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>,
Jonathan Corbet <corbet@lwn.net>,
Ankit Jindal <thatsjindal@gmail.com>,
Jan Viktorin <viktorin@rehivetech.com>,
Rob Herring <robh+dt@kernel.org>, Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
bcm-kernel-feedback-list@broadcom.com
Subject: Re: [PATCH 5/8] uio: fix dmem_region_start computation
Date: Fri, 15 Jul 2016 20:32:24 +0900 [thread overview]
Message-ID: <20160715113224.GA26029@kroah.com> (raw)
In-Reply-To: <1468573443-4670-6-git-send-email-anup.patel@broadcom.com>
On Fri, Jul 15, 2016 at 02:34:00PM +0530, Anup Patel wrote:
> From: Jan Viktorin <viktorin@rehivetech.com>
>
> The variable i contains a total number of resources (including
> IORESOURCE_IRQ). However, we want the dmem_region_start to point
> after the last resource of type IORESOURCE_MEM. The original behaviour
> leads (very likely) to skipping several UIO mapping regions and makes
> them useless. Fix this by computing dmem_region_start from the uiomem
> which points to the last used UIO mapping.
>
> Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation")
>
> Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
> ---
> drivers/uio/uio_dmem_genirq.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Why isn't this patch first in the series, with a stable marking, and
your signed off on it (you are forwarding it on to me, so you need to
add your mark to it as well, I can't take it otherwise.)
> diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
> index 915facb..e1134a4 100644
> --- a/drivers/uio/uio_dmem_genirq.c
> +++ b/drivers/uio/uio_dmem_genirq.c
> @@ -229,7 +229,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
> ++uiomem;
> }
>
> - priv->dmem_region_start = i;
> + priv->dmem_region_start = uiomem - &uioinfo->mem[0];
Are you sure about this? It doesn't look correct at first glance, I'm
loath to take this without a bunch of testing. Were you able to test
this out to verify it doesn't break working hardware?
thanks,
greg k-h
next prev parent reply other threads:[~2016-07-15 11:32 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-15 9:03 [PATCH 0/8] Cache-coherent DMA access using UIO Anup Patel
2016-07-15 9:03 ` [PATCH 1/8] uio: code style cleanup Anup Patel
2016-07-15 9:03 ` [PATCH 2/8] uio: Add new UIO_MEM_PHYS_CACHE type for mem regions Anup Patel
2016-07-15 9:03 ` [PATCH 3/8] uio: Add new UIO_MEM_DEVICE " Anup Patel
2016-07-15 9:03 ` [PATCH 4/8] Documentation: Update documentation for UIO_MEM_PHYS_CACHE and UIO_MEM_DEVICE Anup Patel
2016-07-15 9:04 ` [PATCH 5/8] uio: fix dmem_region_start computation Anup Patel
2016-07-15 11:32 ` Greg Kroah-Hartman [this message]
2016-07-15 12:02 ` Jan Viktorin
2016-07-15 9:04 ` [PATCH 6/8] uio: UIO_IRQ_NONE is a valid option for uioinfo->irq Anup Patel
2016-07-15 9:04 ` [PATCH 7/8] uio: bind uio_dmem_genirq via OF Anup Patel
2016-07-15 9:45 ` Russell King - ARM Linux
2016-07-15 10:47 ` Anup Patel
2016-07-15 13:28 ` Mark Rutland
2016-07-15 16:27 ` Anup Patel
2016-07-15 16:52 ` Mark Rutland
2016-07-18 3:17 ` Anup Patel
2016-07-15 9:04 ` [PATCH 8/8] uio: Use new memtypes in uio_dmem_genirq Anup Patel
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=20160715113224.GA26029@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=anup.patel@broadcom.com \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=corbet@lwn.net \
--cc=hjk@hansjkoch.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rjui@broadcom.com \
--cc=robh+dt@kernel.org \
--cc=sbranden@broadcom.com \
--cc=thatsjindal@gmail.com \
--cc=viktorin@rehivetech.com \
/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).