This function tries to return the number of bytes that it was able to copy to the user. However, because there are multiple calls to copy_to_user() in a row that means the bytes are not necessarily consecutive so it's not useful. Just return -EFAULT instead.
Fixes: 3dc0d7091778 ("ASoC: SOF: Convert the generic probe support to SOF client") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com --- sound/soc/sof/sof-client-probes.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/sound/soc/sof/sof-client-probes.c b/sound/soc/sof/sof-client-probes.c index 1f1ea93a7fbf..679bc7d371fc 100644 --- a/sound/soc/sof/sof-client-probes.c +++ b/sound/soc/sof/sof-client-probes.c @@ -385,7 +385,6 @@ static int sof_probes_compr_copy(struct snd_soc_component *component, struct snd_compr_runtime *rtd = cstream->runtime; unsigned int offset, n; void *ptr; - int ret;
if (count > rtd->buffer_size) count = rtd->buffer_size; @@ -395,14 +394,15 @@ static int sof_probes_compr_copy(struct snd_soc_component *component, n = rtd->buffer_size - offset;
if (count < n) { - ret = copy_to_user(buf, ptr, count); + if (copy_to_user(buf, ptr, count)) + return -EFAULT; } else { - ret = copy_to_user(buf, ptr, n); - ret += copy_to_user(buf + n, rtd->dma_area, count - n); + if (copy_to_user(buf, ptr, n)) + return -EFAULT; + if (copy_to_user(buf + n, rtd->dma_area, count - n)) + return -EFAULT; }
- if (ret) - return count - ret; return count; }