On 5/7/19 2:39 PM, Takashi Iwai wrote:
This fixes a compile warning below by properly handling the error code from sof_get_ctrl_copy_params(): include/linux/kernel.h:843:43: warning: 'sparams.pl_size' may be used uninitialized in this function [-Wmaybe-uninitialized] sound/soc/sof/ipc.c:639:34: note: 'sparams.pl_size' was declared here
The function returns an error before setting sparams.pl_size, so it'd assign an uninitialized value at a later point.
Thanks Takashi.
I don't recall having seen this warning and this code has been around for a while. Does this show with a special config/compiler?
Adding Jaska since he wrote the support for large control data.
Fixes: 53e0c72d98ba ("ASoC: SOF: Add support for IPC IO between DSP and Host") Signed-off-by: Takashi Iwai tiwai@suse.de
sound/soc/sof/ipc.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index ba1bb17a8d1e..f0b9d3c53f6f 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -567,7 +567,7 @@ static int sof_set_get_large_ctrl_data(struct snd_sof_dev *sdev, size_t offset = 0; size_t msg_bytes; size_t pl_size;
- int err = 0;
int err; int i;
/* allocate max ipc size because we have at least one */
@@ -576,9 +576,13 @@ static int sof_set_get_large_ctrl_data(struct snd_sof_dev *sdev, return -ENOMEM;
if (send)
sof_get_ctrl_copy_params(cdata->type, cdata, partdata, sparams);
err = sof_get_ctrl_copy_params(cdata->type, cdata, partdata,sparams);
sof_get_ctrl_copy_params(cdata->type, partdata, cdata, sparams);
err = sof_get_ctrl_copy_params(cdata->type, partdata, cdata,sparams);if (err < 0)
return err;msg_bytes = sparams->msg_bytes; pl_size = sparams->pl_size;