firmware: cs_dsp: test_bin_error: Fix uninitialized data used as fw version

Call cs_dsp_mock_xm_header_get_fw_version() to get the firmware version
from the dummy XM header data in cs_dsp_bin_err_test_common_init().

Make the same change to cs_dsp_bin_test_common_init() and remove the
cs_dsp_mock_xm_header_get_fw_version_from_regmap() function.

The code in cs_dsp_test_bin.c was correctly calling
cs_dsp_mock_xm_header_get_fw_version_from_regmap() to fetch the fw version
from a dummy header it wrote to XM registers. However in
cs_dsp_test_bin_error.c the test doesn't stuff a dummy header into XM, it
populates it the normal way using a wmfw file. It should have called
cs_dsp_mock_xm_header_get_fw_version() to get the data from its blob
buffer, but was calling cs_dsp_mock_xm_header_get_fw_version_from_regmap().
As nothing had been written to the registers this returned the value of
uninitialized data.

The only other use of cs_dsp_mock_xm_header_get_fw_version_from_regmap()
was cs_dsp_test_bin.c, but it doesn't need to use it. It already has a
blob buffer containing the dummy XM header so it can use
cs_dsp_mock_xm_header_get_fw_version() to read from that.

Fixes: cd8c058499b6 ("firmware: cs_dsp: Add KUnit testing of bin error cases")
Signed-off-by: Richard Fitzgerald <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/firmware/cirrus/test/cs_dsp_mock_mem_maps.c

···
 EXPORT_SYMBOL_NS_GPL(cs_dsp_mock_xm_header_get_alg_base_in_words, "FW_CS_DSP_KUNIT_TEST_UTILS");
 
 /**
- * cs_dsp_mock_xm_header_get_fw_version_from_regmap() - Firmware version.
- *
- * @priv:	Pointer to struct cs_dsp_test.
- *
- * Return: Firmware version word value.
- */
-unsigned int cs_dsp_mock_xm_header_get_fw_version_from_regmap(struct cs_dsp_test *priv)
-{
-	unsigned int xm = cs_dsp_mock_base_addr_for_mem(priv, WMFW_ADSP2_XM);
-	union {
-		struct wmfw_id_hdr adsp2;
-		struct wmfw_v3_id_hdr halo;
-	} hdr;
-
-	switch (priv->dsp->type) {
-	case WMFW_ADSP2:
-		regmap_raw_read(priv->dsp->regmap, xm, &hdr.adsp2, sizeof(hdr.adsp2));
-		return be32_to_cpu(hdr.adsp2.ver);
-	case WMFW_HALO:
-		regmap_raw_read(priv->dsp->regmap, xm, &hdr.halo, sizeof(hdr.halo));
-		return be32_to_cpu(hdr.halo.ver);
-	default:
-		KUNIT_FAIL(priv->test, NULL);
-		return 0;
-	}
-}
-EXPORT_SYMBOL_NS_GPL(cs_dsp_mock_xm_header_get_fw_version_from_regmap,
-		     "FW_CS_DSP_KUNIT_TEST_UTILS");
-
-/**
  * cs_dsp_mock_xm_header_get_fw_version() - Firmware version.
  *
  * @header:	Pointer to struct cs_dsp_mock_xm_header.

drivers/firmware/cirrus/test/cs_dsp_test_bin.c

···
 
 	priv->local->bin_builder =
 		cs_dsp_mock_bin_init(priv, 1,
-				     cs_dsp_mock_xm_header_get_fw_version_from_regmap(priv));
+				     cs_dsp_mock_xm_header_get_fw_version(xm_hdr));
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->local->bin_builder);
 
 	/* We must provide a dummy wmfw to load */

drivers/firmware/cirrus/test/cs_dsp_test_bin_error.c

···
 
 	local->bin_builder =
 		cs_dsp_mock_bin_init(priv, 1,
-				     cs_dsp_mock_xm_header_get_fw_version_from_regmap(priv));
+				     cs_dsp_mock_xm_header_get_fw_version(local->xm_header));
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, local->bin_builder);
 
 	/* Init cs_dsp */

include/linux/firmware/cirrus/cs_dsp_test_utils.h

···
 unsigned int cs_dsp_mock_xm_header_get_alg_base_in_words(struct cs_dsp_test *priv,
 							 unsigned int alg_id,
 							 int mem_type);
-unsigned int cs_dsp_mock_xm_header_get_fw_version_from_regmap(struct cs_dsp_test *priv);
 unsigned int cs_dsp_mock_xm_header_get_fw_version(struct cs_dsp_mock_xm_header *header);
 void cs_dsp_mock_xm_header_drop_from_regmap_cache(struct cs_dsp_test *priv);
 int cs_dsp_mock_xm_header_write_to_regmap(struct cs_dsp_mock_xm_header *header);