diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spidev.c | 42 |
1 files changed, 11 insertions, 31 deletions
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index d4d2d8d9f3e7..cda10719d1d1 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -253,10 +253,6 @@ static int spidev_message(struct spidev_data *spidev, goto done; } k_tmp->rx_buf = rx_buf; - if (!access_ok(VERIFY_WRITE, (u8 __user *) - (uintptr_t) u_tmp->rx_buf, - u_tmp->len)) - goto done; rx_buf += k_tmp->len; } if (u_tmp->tx_buf) { @@ -304,7 +300,7 @@ static int spidev_message(struct spidev_data *spidev, rx_buf = spidev->rx_buffer; for (n = n_xfers, u_tmp = u_xfers; n; n--, u_tmp++) { if (u_tmp->rx_buf) { - if (__copy_to_user((u8 __user *) + if (copy_to_user((u8 __user *) (uintptr_t) u_tmp->rx_buf, rx_buf, u_tmp->len)) { status = -EFAULT; @@ -346,7 +342,6 @@ spidev_get_ioc_message(unsigned int cmd, struct spi_ioc_transfer __user *u_ioc, static long spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { - int err = 0; int retval = 0; struct spidev_data *spidev; struct spi_device *spi; @@ -358,19 +353,6 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) if (_IOC_TYPE(cmd) != SPI_IOC_MAGIC) return -ENOTTY; - /* Check access direction once here; don't repeat below. - * IOC_DIR is from the user perspective, while access_ok is - * from the kernel perspective; so they look reversed. - */ - if (_IOC_DIR(cmd) & _IOC_READ) - err = !access_ok(VERIFY_WRITE, - (void __user *)arg, _IOC_SIZE(cmd)); - if (err == 0 && _IOC_DIR(cmd) & _IOC_WRITE) - err = !access_ok(VERIFY_READ, - (void __user *)arg, _IOC_SIZE(cmd)); - if (err) - return -EFAULT; - /* guard against device removal before, or while, * we issue this ioctl. */ @@ -393,31 +375,31 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) switch (cmd) { /* read requests */ case SPI_IOC_RD_MODE: - retval = __put_user(spi->mode & SPI_MODE_MASK, + retval = put_user(spi->mode & SPI_MODE_MASK, (__u8 __user *)arg); break; case SPI_IOC_RD_MODE32: - retval = __put_user(spi->mode & SPI_MODE_MASK, + retval = put_user(spi->mode & SPI_MODE_MASK, (__u32 __user *)arg); break; case SPI_IOC_RD_LSB_FIRST: - retval = __put_user((spi->mode & SPI_LSB_FIRST) ? 1 : 0, + retval = put_user((spi->mode & SPI_LSB_FIRST) ? 1 : 0, (__u8 __user *)arg); break; case SPI_IOC_RD_BITS_PER_WORD: - retval = __put_user(spi->bits_per_word, (__u8 __user *)arg); + retval = put_user(spi->bits_per_word, (__u8 __user *)arg); break; case SPI_IOC_RD_MAX_SPEED_HZ: - retval = __put_user(spidev->speed_hz, (__u32 __user *)arg); + retval = put_user(spidev->speed_hz, (__u32 __user *)arg); break; /* write requests */ case SPI_IOC_WR_MODE: case SPI_IOC_WR_MODE32: if (cmd == SPI_IOC_WR_MODE) - retval = __get_user(tmp, (u8 __user *)arg); + retval = get_user(tmp, (u8 __user *)arg); else - retval = __get_user(tmp, (u32 __user *)arg); + retval = get_user(tmp, (u32 __user *)arg); if (retval == 0) { u32 save = spi->mode; @@ -436,7 +418,7 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } break; case SPI_IOC_WR_LSB_FIRST: - retval = __get_user(tmp, (__u8 __user *)arg); + retval = get_user(tmp, (__u8 __user *)arg); if (retval == 0) { u32 save = spi->mode; @@ -453,7 +435,7 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } break; case SPI_IOC_WR_BITS_PER_WORD: - retval = __get_user(tmp, (__u8 __user *)arg); + retval = get_user(tmp, (__u8 __user *)arg); if (retval == 0) { u8 save = spi->bits_per_word; @@ -466,7 +448,7 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } break; case SPI_IOC_WR_MAX_SPEED_HZ: - retval = __get_user(tmp, (__u32 __user *)arg); + retval = get_user(tmp, (__u32 __user *)arg); if (retval == 0) { u32 save = spi->max_speed_hz; @@ -516,8 +498,6 @@ spidev_compat_ioc_message(struct file *filp, unsigned int cmd, struct spi_ioc_transfer *ioc; u_ioc = (struct spi_ioc_transfer __user *) compat_ptr(arg); - if (!access_ok(VERIFY_READ, u_ioc, _IOC_SIZE(cmd))) - return -EFAULT; /* guard against device removal before, or while, * we issue this ioctl. |