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Subject[PATCH v4 1/1] ASoC: Intel: Skylake: Remove static table index when parsing topology
Date
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.

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 118866cd5075..c1c37ce759bd 100644
--- a/sound/soc/intel/skylake/skl-topology.c
+++ b/sound/soc/intel/skylake/skl-topology.c
@@ -3333,25 +3333,6 @@ 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_dev *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.
@@ -3362,6 +3343,7 @@ 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;

@@ -3384,9 +3366,17 @@ 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;
--
2.17.1
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