> copy_to_user() returns the number of bytes remaining to be copied but we
> want to return an error code. And that error code is -EFAULT not -EIO.
>
> Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
>
> diff --git a/drivers/staging/intel_sst/intel_sst_app_interface.c
> b/drivers/staging/intel_sst/intel_sst_app_interface.c
> index baf0ddc..5ead4d1 100644
> --- a/drivers/staging/intel_sst/intel_sst_app_interface.c
> +++ b/drivers/staging/intel_sst/intel_sst_app_interface.c
> @@ -865,6 +865,8 @@ long intel_sst_ioctl(struct file *file_ptr, unsigned int cmd,
> unsigned long arg)
> str_info->src = SST_DRV;
> retval = copy_to_user(&str_param->stream_id,
> &retval, sizeof(__u32));
> + if (retval)
> + retval = -EFAULT;
> } else {
> if (retval == -SST_ERR_INVALID_PARAMS)
> retval = -EINVAL;
> @@ -938,7 +940,7 @@ long intel_sst_ioctl(struct file *file_ptr, unsigned int cmd,
> unsigned long arg)
> retval = copy_to_user((struct snd_sst_vol *)arg,
> &get_vol, sizeof(get_vol));
> if (retval) {
> - retval = -EIO;
> + retval = -EFAULT;
> break;
> }
> /*sst_print_get_vol_info(str_id, &get_vol);*/
Since retval is not used and value assigned is supposed to be -EFAULT,
how about this?
if(copy_to_user())
return -EIO;
~Vinod
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