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ASoC: cs-amp-lib-test: Force test calibration blob entries to be valid

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For a normal calibration blob the calTarget values must be non-zero and
unique, and the calTime values must be non-zero. Don't rely on
get_random_bytes() to be random enough to guarantee this. Force the
calTarget and calTime values to be valid while retaining randomness
in the values.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 177862317a ("ASoC: cs-amp-lib: Add KUnit test for calibration helpers")
Link: https://patch.msgid.link/20240822115725.259568-1-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Richard Fitzgerald 2024-08-22 12:57:25 +01:00 committed by Mark Brown
parent 5f7c98b751
commit bff980d8d9
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GPG key ID: 24D68B725D5487D0
1 changed files with 9 additions and 0 deletions
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9
sound/soc/codecs/cs-amp-lib-test.c
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@ -38,6 +38,7 @@ static void cs_amp_lib_test_init_dummy_cal_blob(struct kunit *test, int num_amps
{
struct cs_amp_lib_test_priv *priv = test->priv;
unsigned int blob_size;
int i;
blob_size = offsetof(struct cirrus_amp_efi_data, data) +
sizeof(struct cirrus_amp_cal_data) * num_amps;
@ -49,6 +50,14 @@ static void cs_amp_lib_test_init_dummy_cal_blob(struct kunit *test, int num_amps
priv->cal_blob->count = num_amps;
get_random_bytes(priv->cal_blob->data, sizeof(struct cirrus_amp_cal_data) * num_amps);
/* Ensure all timestamps are non-zero to mark the entry valid. */
for (i = 0; i < num_amps; i++)
priv->cal_blob->data[i].calTime[0] |= 1;
/* Ensure that all UIDs are non-zero and unique. */
for (i = 0; i < num_amps; i++)
*(u8 *)&priv->cal_blob->data[i].calTarget[0] = i + 1;
}
static u64 cs_amp_lib_test_get_target_uid(struct kunit *test)