6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
[ Upstream commit bb4485562f5907708f1c218b5d70dce04165d1e1 ]
If the timestamp of a calibration entry is 0 it is an unused entry and
must be ignored.
Some end-products reserve EFI space for calibration entries by shipping
with a zero-filled EFI file. When searching the file for calibration
data the driver must skip the empty entries. The timestamp of a valid
entry is always non-zero.
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Fixes: 1cad8725f2b9 ("ASoC: cs-amp-lib: Add helpers for factory calibration data")
Link: https://patch.msgid.link/20240822133544.304421-1-rf@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/soc/codecs/cs-amp-lib.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/cs-amp-lib.c b/sound/soc/codecs/cs-amp-lib.c
index 605964af8afad..51b128c806718 100644
--- a/sound/soc/codecs/cs-amp-lib.c
+++ b/sound/soc/codecs/cs-amp-lib.c
@@ -182,6 +182,10 @@ static int _cs_amp_get_efi_calibration_data(struct device *dev, u64 target_uid,
for (i = 0; i < efi_data->count; ++i) {
u64 cal_target = cs_amp_cal_target_u64(&efi_data->data[i]);
+ /* Skip empty entries */
+ if (!efi_data->data[i].calTime[0] && !efi_data->data[i].calTime[1])
+ continue;
+
/* Skip entries with unpopulated silicon ID */
if (cal_target == 0)
continue;
@@ -193,7 +197,8 @@ static int _cs_amp_get_efi_calibration_data(struct device *dev, u64 target_uid,
}
}
- if (!cal && (amp_index >= 0) && (amp_index < efi_data->count)) {
+ if (!cal && (amp_index >= 0) && (amp_index < efi_data->count) &&
+ (efi_data->data[amp_index].calTime[0] || efi_data->data[amp_index].calTime[1])) {
u64 cal_target = cs_amp_cal_target_u64(&efi_data->data[amp_index]);
/*
--
2.43.0
