1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * 32bit -> 64bit ioctl wrapper for hwdep API
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
7 /* This file is included from hwdep.c */
9 #include <linux/compat.h>
11 struct snd_hwdep_dsp_image32 {
13 unsigned char name[64];
14 u32 image; /* pointer */
17 } /* don't set packed attribute here */;
19 static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
20 struct snd_hwdep_dsp_image32 __user *src)
22 struct snd_hwdep_dsp_image __user *dst;
26 dst = compat_alloc_user_space(sizeof(*dst));
29 if (copy_in_user(dst, src, 4 + 64))
31 if (get_user(ptr, &src->image) ||
32 put_user(compat_ptr(ptr), &dst->image))
34 if (get_user(val, &src->length) ||
35 put_user(val, &dst->length))
37 if (get_user(val, &src->driver_data) ||
38 put_user(val, &dst->driver_data))
41 return snd_hwdep_dsp_load(hw, dst);
45 SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
48 static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
51 struct snd_hwdep *hw = file->private_data;
52 void __user *argp = compat_ptr(arg);
54 case SNDRV_HWDEP_IOCTL_PVERSION:
55 case SNDRV_HWDEP_IOCTL_INFO:
56 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
57 return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
58 case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
59 return snd_hwdep_dsp_load_compat(hw, argp);
61 if (hw->ops.ioctl_compat)
62 return hw->ops.ioctl_compat(hw, file, cmd, arg);