All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: linux-integrity@vger.kernel.org
Cc: linux-security-module@vger.kernel.org,
	James Bottomley <James.Bottomley@HansenPartnership.com>,
	Tomas Winkler <tomas.winkler@intel.com>,
	Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
	Peter Huewe <peterhuewe@gmx.de>, Jason Gunthorpe <jgg@ziepe.ca>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH 5/6] tpm: encapsulate tpm_dev_transmit()
Date: Sat,  3 Nov 2018 06:08:19 +0200	[thread overview]
Message-ID: <20181103040820.23360-6-jarkko.sakkinen@linux.intel.com> (raw)
In-Reply-To: <20181103040820.23360-1-jarkko.sakkinen@linux.intel.com>

Encapsulate tpm_transmit() call pattern to tpm_dev_transmit() because it
is identically used from two places. Use unlocked version of
tpm_transmit() so that we are able to move the calls to
tpm2_prepare_space() and tpm2_commit_space() later on to this new
function.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
 drivers/char/tpm/tpm-dev-common.c | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c
index 99b5133a9d05..cbb0ee30b511 100644
--- a/drivers/char/tpm/tpm-dev-common.c
+++ b/drivers/char/tpm/tpm-dev-common.c
@@ -27,7 +27,19 @@
 static struct workqueue_struct *tpm_dev_wq;
 static DEFINE_MUTEX(tpm_dev_wq_lock);
 
-static void tpm_async_work(struct work_struct *work)
+static ssize_t tpm_dev_transmit(struct tpm_chip *chip, struct tpm_space *space,
+				u8 *buf, size_t bufsiz)
+{
+	ssize_t ret;
+
+	mutex_lock(&chip->tpm_mutex);
+	ret = tpm_transmit(chip, space, buf, bufsiz, TPM_TRANSMIT_UNLOCKED);
+	mutex_unlock(&chip->tpm_mutex);
+
+	return ret;
+}
+
+static void tpm_dev_async_work(struct work_struct *work)
 {
 	struct file_priv *priv =
 			container_of(work, struct file_priv, async_work);
@@ -35,9 +47,8 @@ static void tpm_async_work(struct work_struct *work)
 
 	mutex_lock(&priv->buffer_mutex);
 	priv->command_enqueued = false;
-	ret = tpm_transmit(priv->chip, priv->space, priv->data_buffer,
-			   sizeof(priv->data_buffer), 0);
-
+	ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer,
+			       sizeof(priv->data_buffer));
 	tpm_put_ops(priv->chip);
 	if (ret > 0) {
 		priv->data_pending = ret;
@@ -78,7 +89,7 @@ void tpm_common_open(struct file *file, struct tpm_chip *chip,
 	mutex_init(&priv->buffer_mutex);
 	timer_setup(&priv->user_read_timer, user_reader_timeout, 0);
 	INIT_WORK(&priv->timeout_work, tpm_timeout_work);
-	INIT_WORK(&priv->async_work, tpm_async_work);
+	INIT_WORK(&priv->async_work, tpm_dev_async_work);
 	init_waitqueue_head(&priv->async_wait);
 	file->private_data = priv;
 }
@@ -163,8 +174,8 @@ ssize_t tpm_common_write(struct file *file, const char __user *buf,
 		return size;
 	}
 
-	ret = tpm_transmit(priv->chip, priv->space, priv->data_buffer,
-			   sizeof(priv->data_buffer), 0);
+	ret = tpm_dev_transmit(priv->chip, priv->space, priv->data_buffer,
+			       sizeof(priv->data_buffer));
 	tpm_put_ops(priv->chip);
 
 	if (ret > 0) {
-- 
2.19.1


  parent reply	other threads:[~2018-11-03  4:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-03  4:08 [PATCH 0/6] Detach TPM space code from tpm_transmit() flow Jarkko Sakkinen
2018-11-03  4:08 ` [PATCH 1/6] tpm: use tpm_buf in tpm_transmit_cmd() as the IO parameter Jarkko Sakkinen
2018-11-03  4:08 ` [PATCH 2/6] tpm: clean up tpm_try_transmit() error handling flow Jarkko Sakkinen
2018-11-03  4:08 ` [PATCH 3/6] tpm: access command header through struct in tpm_try_transmit() Jarkko Sakkinen
2018-11-03  4:08 ` [PATCH 4/6] tpm: move tpm_validate_commmand() to tpm2-space.c Jarkko Sakkinen
2018-11-03 11:11   ` kbuild test robot
2018-11-03  4:08 ` Jarkko Sakkinen [this message]
2018-11-03  4:08 ` [PATCH 6/6] tpm: move TPM space code out of tpm_transmit() Jarkko Sakkinen

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=20181103040820.23360-6-jarkko.sakkinen@linux.intel.com \
    --to=jarkko.sakkinen@linux.intel.com \
    --cc=James.Bottomley@HansenPartnership.com \
    --cc=arnd@arndb.de \
    --cc=gregkh@linuxfoundation.org \
    --cc=jgg@ziepe.ca \
    --cc=linux-integrity@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=peterhuewe@gmx.de \
    --cc=tomas.winkler@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.