From c4df71d43a5beaab5fe13a8d8974f77596bb2a22 Mon Sep 17 00:00:00 2001 From: Jarkko Sakkinen Date: Sat, 3 Nov 2018 04:46:50 +0200 Subject: tpm: encapsulate tpm_dev_transmit() 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 Reviewed-by: Stefan Berger Tested-by: Stefan Berger Reviewed-by: Jerry Snitselaar Reviewed-by: James Bottomley Tested-by: Alexander Steffen --- drivers/char/tpm/tpm-dev-common.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) (limited to 'drivers/char') diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c index 5eecad233ea1..759796953d84 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->response_length = ret; @@ -80,7 +91,7 @@ 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; } @@ -183,8 +194,8 @@ 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) { -- cgit