All of lore.kernel.org
 help / color / mirror / Atom feed
From: Peter Stuge <peter@stuge.se>
To: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: shashank chaturvedi <chaturvedi9950@gmail.com>,
	linux-usb@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: xhci Portsc register issue
Date: Fri, 26 Oct 2012 00:37:06 +0200	[thread overview]
Message-ID: <20121025223706.17034.qmail@stuge.se> (raw)
In-Reply-To: <20121025153552.GA5205@xanatos>

Sarah Sharp wrote:
> I'm not sure, since I've never attempted to memory map PCI registers
> from userspace.  I was under the impression that you just can't do that.

Need root, and the kernel still gets a say, but yes, you can just do that.

http://stuge.se/physrd.c


//Peter

  parent reply	other threads:[~2012-10-25 22:37 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CALuomMuUD4xSaCUT6MZn3ZV2gjXnuBUhkz78PgXZ6XgV4e-NvA@mail.gmail.com>
2012-10-25 15:36 ` xhci Portsc register issue Sarah Sharp
2012-10-25 16:45   ` Bjorn Helgaas
2012-10-25 22:37   ` Peter Stuge [this message]
     [not found]     ` <CALuomMs-Z_PH3KpEPDgjBr5oy86Go2G2PAxu_k2yxgzWwRhJYQ@mail.gmail.com>
2012-10-26 17:17       ` Sarah Sharp
2012-10-26  7:12   ` Gerd Hoffmann

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=20121025223706.17034.qmail@stuge.se \
    --to=peter@stuge.se \
    --cc=chaturvedi9950@gmail.com \
    --cc=linux-pci@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=sarah.a.sharp@linux.intel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.