Linux cryptographic layer development
 help / color / mirror / Atom feed
From: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
To: linux-crypto@vger.kernel.org
Subject: Crypto API
Date: Wed, 13 Jan 2010 08:28:56 +0200	[thread overview]
Message-ID: <4B4D6828.9000506@nokia.com> (raw)

Hi,

I develop some drivers for crypto HW and met some difficulties.
Some algorithm functions are called behind crypto_kmap()

data = crypto_kmap(sg_page(sg), 0);

It will do inc_preempt_count();

I try to use DMA controller to perform memory transfers and try to use
wait_for_completion()

But of course  it gives

BUG: sleeping function called from invalid context at kernel/sched.c:5786

What is the best way to handle such case?

Thanks,
Dmitry



             reply	other threads:[~2010-01-13  6:29 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-13  6:28 Dmitry Kasatkin [this message]
2010-01-14  0:40 ` Crypto API Herbert Xu

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=4B4D6828.9000506@nokia.com \
    --to=dmitry.kasatkin@nokia.com \
    --cc=linux-crypto@vger.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