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// SPDX-License-Identifier: GPL-2.0-or-later /* * 32bit -> 64bit ioctl wrapper for hwdep API * Copyright (c) by Takashi Iwai <tiwai@suse.de> */ /* This file is included from hwdep.c */ #include <linux/compat.h> struct snd_hwdep_dsp_image32 { u32 index; unsigned char name[64]; u32 image; /* pointer */ u32 length; u32 driver_data; } /* don't set packed attribute here */; static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw, struct snd_hwdep_dsp_image32 __user *src) { struct snd_hwdep_dsp_image info = {}; compat_caddr_t ptr; if (copy_from_user(&info, src, 4 + 64) || get_user(ptr, &src->image) || get_user(info.length, &src->length) || get_user(info.driver_data, &src->driver_data)) return -EFAULT; info.image = compat_ptr(ptr); return snd_hwdep_dsp_load(hw, &info); } enum { SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32) }; static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd, unsigned long arg) { struct snd_hwdep *hw = file->private_data; void __user *argp = compat_ptr(arg); switch (cmd) { case SNDRV_HWDEP_IOCTL_PVERSION: case SNDRV_HWDEP_IOCTL_INFO: case SNDRV_HWDEP_IOCTL_DSP_STATUS: return snd_hwdep_ioctl(file, cmd, (unsigned long)argp); case SNDRV_HWDEP_IOCTL_DSP_LOAD32: return snd_hwdep_dsp_load_compat(hw, argp); } if (hw->ops.ioctl_compat) return hw->ops.ioctl_compat(hw, file, cmd, arg); return -ENOIOCTLCMD; } |