mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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cb04e6b619
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*
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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 program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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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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