[PATCH 4.19 173/211] ASoC: Intel: Fix use of potentially uninitialized variable

[Greg Kroah-Hartman]

From: Amadeusz SÅawiÅski <amadeuszx.slawinski@xxxxxxxxx>

commit 810f3b860850148788fc1ed8a6f5f807199fed65 upstream.

If ipc->ops.reply_msg_match is NULL, we may end up using uninitialized
mask value.

reported by smatch:
sound/soc/intel/common/sst-ipc.c:266 sst_ipc_reply_find_msg() error: uninitialized symbol 'mask'.

Signed-off-by: Amadeusz SÅawiÅski <amadeuszx.slawinski@xxxxxxxxx>
Link: https://lore.kernel.org/r/20190827141712.21015-3-amadeuszx.slawinski@xxxxxxxxxxxxxxx
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 sound/soc/intel/common/sst-ipc.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/sound/soc/intel/common/sst-ipc.c
+++ b/sound/soc/intel/common/sst-ipc.c
@@ -231,6 +231,8 @@ struct ipc_message *sst_ipc_reply_find_m
 
 	if (ipc->ops.reply_msg_match != NULL)
 		header = ipc->ops.reply_msg_match(header, &mask);
+	else
+		mask = (u64)-1;
 
 	if (list_empty(&ipc->rx_list)) {
 		dev_err(ipc->dev, "error: rx list empty but received 0x%llx\n",