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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;
- }
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