Unverified Commit 096769ea authored by Amadeusz Sławiński's avatar Amadeusz Sławiński Committed by Mark Brown
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ASoC: Intel: Skylake: Remove static table index when parsing topology



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: default avatarAmadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190726090929.27946-2-amadeuszx.slawinski@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c8415833
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+12 −22
Original line number Diff line number Diff line
@@ -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;