Compress offload does not support ioctl calls from a 32bit userspace in a 64 bit kernel. This patch adds support for ioctls from a 32bit userspace in a 64bit kernel
Signed-off-by: Ravindra Lokhande rlokhande@nvidia.com ---
v1 -> v2: use compat_ptr to convert 32 bit address to 64 bit pointer
sound/core/compress_offload.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index b123c42..4c156a7 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -847,6 +847,15 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg) return retval; }
+/* support of 32bit userspace on 64bit platforms */ +#ifdef CONFIG_COMPAT +static long snd_compr_ioctl_compat(struct file *file, unsigned int cmd, + unsigned long arg) +{ + return snd_compr_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); +} +#endif + static const struct file_operations snd_compr_file_ops = { .owner = THIS_MODULE, .open = snd_compr_open, @@ -854,6 +863,9 @@ static const struct file_operations snd_compr_file_ops = { .write = snd_compr_write, .read = snd_compr_read, .unlocked_ioctl = snd_compr_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = snd_compr_ioctl_compat, +#endif .mmap = snd_compr_mmap, .poll = snd_compr_poll, };