ALSA: compress: fix the return value for SNDRV_COMPRESS_VERSION

the return value of SNDRV_COMPRESS_VERSION always return default -ENOTTY as the
return value was never updated for this call
assign return value from put_user()

Reported-by: Haynes <hgeorge@codeaurora.org>
CC: stable@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index 99db892d7299056568e5432bdd660ea14d3143c6..98969541cbcc9c62ff81afb9818d2399dd6e7eb0 100644 (file)
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -743,7 +743,7 @@ static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
        mutex_lock(&stream->device->lock);
        switch (_IOC_NR(cmd)) {
        case _IOC_NR(SNDRV_COMPRESS_IOCTL_VERSION):
-               put_user(SNDRV_COMPRESS_VERSION,
+               retval = put_user(SNDRV_COMPRESS_VERSION,
                                (int __user *)arg) ? -EFAULT : 0;
                break;
        case _IOC_NR(SNDRV_COMPRESS_GET_CAPS):