From: Greg KH <gregkh@linuxfoundation.org>
To: Dragan Cvetic <draganc@xilinx.com>
Cc: "arnd@arndb.de" <arnd@arndb.de>,
Michal Simek <michals@xilinx.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Derek Kiernan <dkiernan@xilinx.com>
Subject: Re: [PATCH V3 04/12] misc: xilinx_sdfec: Add open, close and ioctl
Date: Sat, 4 May 2019 11:02:03 +0200 [thread overview]
Message-ID: <20190504090203.GD13840@kroah.com> (raw)
In-Reply-To: <BL0PR02MB5681F4C4AF4786AC6241DDA1CB350@BL0PR02MB5681.namprd02.prod.outlook.com>
On Fri, May 03, 2019 at 04:44:57PM +0000, Dragan Cvetic wrote:
> > -----Original Message-----
> > From: Greg KH [mailto:gregkh@linuxfoundation.org]
> > Sent: Thursday 2 May 2019 18:23
> > To: Dragan Cvetic <draganc@xilinx.com>
> > Cc: arnd@arndb.de; Michal Simek <michals@xilinx.com>; linux-arm-kernel@lists.infradead.org; robh+dt@kernel.org;
> > mark.rutland@arm.com; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; Derek Kiernan <dkiernan@xilinx.com>
> > Subject: Re: [PATCH V3 04/12] misc: xilinx_sdfec: Add open, close and ioctl
> >
> > On Sat, Apr 27, 2019 at 11:04:58PM +0100, Dragan Cvetic wrote:
> > > +static int xsdfec_dev_open(struct inode *iptr, struct file *fptr)
> > > +{
> > > + struct xsdfec_dev *xsdfec;
> > > +
> > > + xsdfec = container_of(iptr->i_cdev, struct xsdfec_dev, xsdfec_cdev);
> > > +
> > > + if (!atomic_dec_and_test(&xsdfec->open_count)) {
> >
> > Why do you care about this?
> >
> > And do you really think it matters? What are you trying to protect from
> > here?
>
> There is a request to increase the driver security.
How does this affect "security" in any way?
> It is acceptable for us for now, even with non-perfections (will not
> be protected if opened twice with dup() or fork()). This is covered
> in the documentation.
As this really "does nothing", no need to bother the kernel with trying
to keep this logic working properly. So please just drop it.
thanks,
greg k-h
next prev parent reply other threads:[~2019-05-04 9:02 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-27 22:04 [PATCH V3 00/12] misc: xilinx sd-fec drive Dragan Cvetic
2019-04-27 22:04 ` [PATCH V3 01/12] dt-bindings: xilinx-sdfec: Add SDFEC binding Dragan Cvetic
2019-05-01 19:47 ` Rob Herring
2019-05-02 11:04 ` Dragan Cvetic
2019-05-02 20:15 ` Rob Herring
2019-05-03 17:04 ` Dragan Cvetic
2019-04-27 22:04 ` [PATCH V3 02/12] misc: xilinx-sdfec: add core driver Dragan Cvetic
2019-05-02 17:20 ` Greg KH
2019-05-03 16:41 ` Dragan Cvetic
2019-05-04 7:55 ` Greg KH
2019-05-06 12:23 ` Dragan Cvetic
2019-05-06 12:34 ` Greg KH
2019-05-07 8:48 ` Dragan Cvetic
2019-05-07 9:39 ` Greg KH
2019-05-07 11:55 ` Dragan Cvetic
2019-05-07 12:21 ` Greg KH
2019-05-07 13:15 ` Dragan Cvetic
2019-04-27 22:04 ` [PATCH V3 03/12] misc: xilinx_sdfec: Add CCF support Dragan Cvetic
2019-04-27 22:04 ` [PATCH V3 04/12] misc: xilinx_sdfec: Add open, close and ioctl Dragan Cvetic
2019-05-02 17:23 ` Greg KH
2019-05-03 16:44 ` Dragan Cvetic
2019-05-04 9:02 ` Greg KH [this message]
2019-05-02 17:23 ` Greg KH
2019-05-03 16:46 ` Dragan Cvetic
2019-05-04 9:01 ` Greg KH
2019-05-04 14:35 ` Arnd Bergmann
2019-05-04 14:41 ` Greg KH
2019-04-27 22:04 ` [PATCH V3 05/12] misc: xilinx_sdfec: Store driver config and state Dragan Cvetic
2019-04-27 22:05 ` [PATCH V3 06/12] misc: xilinx_sdfec: Add ability to configure turbo Dragan Cvetic
2019-04-27 22:05 ` [PATCH V3 07/12] misc: xilinx_sdfec: Add ability to configure LDPC Dragan Cvetic
2019-05-02 17:27 ` Greg KH
2019-05-03 16:49 ` Dragan Cvetic
2019-05-04 9:00 ` Greg KH
2019-04-27 22:05 ` [PATCH V3 08/12] misc: xilinx_sdfec: Add ability to get/set config Dragan Cvetic
2019-04-27 22:05 ` [PATCH V3 09/12] misc: xilinx_sdfec: Support poll file operation Dragan Cvetic
2019-04-27 22:05 ` [PATCH V3 10/12] misc: xilinx_sdfec: Add stats & status ioctls Dragan Cvetic
2019-04-27 22:05 ` [PATCH V3 11/12] Docs: misc: xilinx_sdfec: Add documentation Dragan Cvetic
2019-04-27 22:05 ` [PATCH V3 12/12] MAINTAINERS: add maintainer for SD-FEC Dragan Cvetic
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=20190504090203.GD13840@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=arnd@arndb.de \
--cc=devicetree@vger.kernel.org \
--cc=dkiernan@xilinx.com \
--cc=draganc@xilinx.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=michals@xilinx.com \
--cc=robh+dt@kernel.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).