ASoC: Intel: Fix use of potentially uninitialized variable

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 Sławiński <amadeuszx.slawinski@intel.com>
Link: https://lore.kernel.org/r/20190827141712.21015-3-amadeuszx.slawinski@linux.intel.com
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/intel/common/sst-ipc.c b/sound/soc/intel/common/sst-ipc.c
index a12c7bb..b96bf44 100644 (file)
--- a/sound/soc/intel/common/sst-ipc.c
+++ b/sound/soc/intel/common/sst-ipc.c
@@ -211,6 +211,8 @@ struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc,
 
        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",