Currently when we remove and reload driver we use previous ref_count value to start iterating over skl->modules which leads to out of table access. To fix this just inline the function and calculate indexes everytime we parse UUID token.

Change-Id: Ic1de06143579c12eb15120d5d7c219767a939042 Signed-off-by: Amadeusz Sławiński amadeuszx.slawinski@linux.intel.com --- sound/soc/intel/skylake/skl-topology.c | 34 +++++++++----------------- 1 file changed, 12 insertions(+), 22 deletions(-)

diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c index 6241e35213af..6f991af7af23 100644 --- a/sound/soc/intel/skylake/skl-topology.c +++ b/sound/soc/intel/skylake/skl-topology.c @@ -3465,25 +3465,6 @@ static int skl_tplg_get_int_tkn(struct device *dev, return tkn_count; }

-static int skl_tplg_get_manifest_uuid(struct device *dev, - struct skl *skl, - struct snd_soc_tplg_vendor_uuid_elem *uuid_tkn) -{ - static int ref_count; - struct skl_module *mod; - - if (uuid_tkn->token == SKL_TKN_UUID) { - mod = skl->modules[ref_count]; - guid_copy(&mod->uuid, (guid_t *)&uuid_tkn->uuid); - ref_count++; - } else { - dev_err(dev, "Not an UUID token tkn %d\n", uuid_tkn->token); - return -EINVAL; - } - - return 0; -} - /* * Fill the manifest structure by parsing the tokens based on the * type. @@ -3494,6 +3475,7 @@ static int skl_tplg_get_manifest_tkn(struct device *dev, { int tkn_count = 0, ret; int off = 0, tuple_size = 0; + u8 uuid_index = 0; struct snd_soc_tplg_vendor_array *array; struct snd_soc_tplg_vendor_value_elem *tkn_elem;

@@ -3516,9 +3498,17 @@ static int skl_tplg_get_manifest_tkn(struct device *dev, continue;

case SND_SOC_TPLG_TUPLE_TYPE_UUID: - ret = skl_tplg_get_manifest_uuid(dev, skl, array->uuid); - if (ret < 0) - return ret; + if (array->uuid->token != SKL_TKN_UUID) { + dev_err(dev, "Not an UUID token: %d\n", + array->uuid->token); + return -EINVAL; + } + if (uuid_index >= skl->nr_modules) { + dev_err(dev, "Too many UUID tokens\n"); + return -EINVAL; + } + guid_copy(&skl->modules[uuid_index++]->uuid, + (guid_t *)&array->uuid->uuid);

tuple_size += sizeof(*array->uuid); continue;