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