Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / core / hwdep_compat.c

diff --git a/kernel/sound/core/hwdep_compat.c b/kernel/sound/core/hwdep_compat.c
new file mode 100644 (file)
index 0000000..3827c0c
--- /dev/null
+++ b/kernel/sound/core/hwdep_compat.c
@@ -0,0 +1,78 @@
+/*
+ *   32bit -> 64bit ioctl wrapper for hwdep API
+ *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+/* 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 __user *dst;
+       compat_caddr_t ptr;
+       u32 val;
+
+       dst = compat_alloc_user_space(sizeof(*dst));
+
+       /* index and name */
+       if (copy_in_user(dst, src, 4 + 64))
+               return -EFAULT;
+       if (get_user(ptr, &src->image) ||
+           put_user(compat_ptr(ptr), &dst->image))
+               return -EFAULT;
+       if (get_user(val, &src->length) ||
+           put_user(val, &dst->length))
+               return -EFAULT;
+       if (get_user(val, &src->driver_data) ||
+           put_user(val, &dst->driver_data))
+               return -EFAULT;
+
+       return snd_hwdep_dsp_load(hw, dst);
+}
+
+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;
+}