On Fri, 04 Dec 2015 14:32:33 +0100, Ravindra Lokhande wrote:

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));

You need to include <linux/compat.h> for this macro.

Takashi

+} +#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, }; -- 2.1.4

---

Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel