struct spidev_data {
dev_t devt;
- spinlock_t spi_lock;
+ struct mutex spi_lock;
struct spi_device *spi;
struct list_head device_entry;
int status;
struct spi_device *spi;
- spin_lock_irq(&spidev->spi_lock);
+ mutex_lock(&spidev->spi_lock);
spi = spidev->spi;
- spin_unlock_irq(&spidev->spi_lock);
if (spi == NULL)
status = -ESHUTDOWN;
if (status == 0)
status = message->actual_length;
+ mutex_unlock(&spidev->spi_lock);
return status;
}
* we issue this ioctl.
*/
spidev = filp->private_data;
- spin_lock_irq(&spidev->spi_lock);
+ mutex_lock(&spidev->spi_lock);
spi = spi_dev_get(spidev->spi);
- spin_unlock_irq(&spidev->spi_lock);
-
- if (spi == NULL)
+ if (spi == NULL) {
+ mutex_unlock(&spidev->spi_lock);
return -ESHUTDOWN;
+ }
/* use the buffer lock here for triple duty:
* - prevent I/O (from us) so calling spi_setup() is safe;
mutex_unlock(&spidev->buf_lock);
spi_dev_put(spi);
+ mutex_unlock(&spidev->spi_lock);
return retval;
}
* we issue this ioctl.
*/
spidev = filp->private_data;
- spin_lock_irq(&spidev->spi_lock);
+ mutex_lock(&spidev->spi_lock);
spi = spi_dev_get(spidev->spi);
- spin_unlock_irq(&spidev->spi_lock);
-
- if (spi == NULL)
+ if (spi == NULL) {
+ mutex_unlock(&spidev->spi_lock);
return -ESHUTDOWN;
+ }
/* SPI_IOC_MESSAGE needs the buffer locked "normally" */
mutex_lock(&spidev->buf_lock);
done:
mutex_unlock(&spidev->buf_lock);
spi_dev_put(spi);
+ mutex_unlock(&spidev->spi_lock);
return retval;
}
spidev = filp->private_data;
filp->private_data = NULL;
- spin_lock_irq(&spidev->spi_lock);
+ mutex_lock(&spidev->spi_lock);
/* ... after we unbound from the underlying device? */
dofree = (spidev->spi == NULL);
- spin_unlock_irq(&spidev->spi_lock);
+ mutex_unlock(&spidev->spi_lock);
/* last close? */
spidev->users--;
/* Initialize the driver data */
spidev->spi = spi;
- spin_lock_init(&spidev->spi_lock);
+ mutex_init(&spidev->spi_lock);
mutex_init(&spidev->buf_lock);
INIT_LIST_HEAD(&spidev->device_entry);
/* prevent new opens */
mutex_lock(&device_list_lock);
/* make sure ops on existing fds can abort cleanly */
- spin_lock_irq(&spidev->spi_lock);
+ mutex_lock(&spidev->spi_lock);
spidev->spi = NULL;
- spin_unlock_irq(&spidev->spi_lock);
+ mutex_unlock(&spidev->spi_lock);
list_del(&spidev->device_entry);
device_destroy(spidev_class, spidev->devt);