diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 24 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 5 |
2 files changed, 16 insertions, 13 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index ef991cd8c02..9bb542913b8 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -24,7 +24,9 @@ */ #include <linux/poll.h> +#include <linux/mutex.h> #include <linux/spinlock.h> + #include "tpm.h" enum tpm_const { @@ -328,10 +330,10 @@ static void timeout_work(struct work_struct *work) { struct tpm_chip *chip = container_of(work, struct tpm_chip, work); - down(&chip->buffer_mutex); + mutex_lock(&chip->buffer_mutex); atomic_set(&chip->data_pending, 0); memset(chip->data_buffer, 0, TPM_BUFSIZE); - up(&chip->buffer_mutex); + mutex_unlock(&chip->buffer_mutex); } /* @@ -380,7 +382,7 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, return -E2BIG; } - down(&chip->tpm_mutex); + mutex_lock(&chip->tpm_mutex); if ((rc = chip->vendor.send(chip, (u8 *) buf, count)) < 0) { dev_err(chip->dev, @@ -419,7 +421,7 @@ out_recv: dev_err(chip->dev, "tpm_transmit: tpm_recv: error %zd\n", rc); out: - up(&chip->tpm_mutex); + mutex_unlock(&chip->tpm_mutex); return rc; } @@ -966,14 +968,14 @@ ssize_t tpm_write(struct file *file, const char __user *buf, while (atomic_read(&chip->data_pending) != 0) msleep(TPM_TIMEOUT); - down(&chip->buffer_mutex); + mutex_lock(&chip->buffer_mutex); if (in_size > TPM_BUFSIZE) in_size = TPM_BUFSIZE; if (copy_from_user (chip->data_buffer, (void __user *) buf, in_size)) { - up(&chip->buffer_mutex); + mutex_unlock(&chip->buffer_mutex); return -EFAULT; } @@ -981,7 +983,7 @@ ssize_t tpm_write(struct file *file, const char __user *buf, out_size = tpm_transmit(chip, chip->data_buffer, TPM_BUFSIZE); atomic_set(&chip->data_pending, out_size); - up(&chip->buffer_mutex); + mutex_unlock(&chip->buffer_mutex); /* Set a timeout by which the reader must come claim the result */ mod_timer(&chip->user_read_timer, jiffies + (60 * HZ)); @@ -1004,10 +1006,10 @@ ssize_t tpm_read(struct file *file, char __user *buf, if (size < ret_size) ret_size = size; - down(&chip->buffer_mutex); + mutex_lock(&chip->buffer_mutex); if (copy_to_user(buf, chip->data_buffer, ret_size)) ret_size = -EFAULT; - up(&chip->buffer_mutex); + mutex_unlock(&chip->buffer_mutex); } return ret_size; @@ -1105,8 +1107,8 @@ struct tpm_chip *tpm_register_hardware(struct device *dev, const struct tpm_vend return NULL; } - init_MUTEX(&chip->buffer_mutex); - init_MUTEX(&chip->tpm_mutex); + mutex_init(&chip->buffer_mutex); + mutex_init(&chip->tpm_mutex); INIT_LIST_HEAD(&chip->list); INIT_WORK(&chip->work, timeout_work); diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 9f273f032b0..b2e2b002a1b 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -21,6 +21,7 @@ #include <linux/module.h> #include <linux/delay.h> #include <linux/fs.h> +#include <linux/mutex.h> #include <linux/sched.h> #include <linux/miscdevice.h> #include <linux/platform_device.h> @@ -94,11 +95,11 @@ struct tpm_chip { /* Data passed to and from the tpm via the read/write calls */ u8 *data_buffer; atomic_t data_pending; - struct semaphore buffer_mutex; + struct mutex buffer_mutex; struct timer_list user_read_timer; /* user needs to claim result */ struct work_struct work; - struct semaphore tpm_mutex; /* tpm is processing */ + struct mutex tpm_mutex; /* tpm is processing */ struct tpm_vendor_specific vendor; |