From 33822d795ab93067d9a65f42003c0d01c65d4a9d Mon Sep 17 00:00:00 2001 From: Richard Fitzgerald Date: Thu, 20 Nov 2025 13:44:37 +0000 Subject: [PATCH] ASoC: cs35l56: Use SND_SOC_BYTES_E_ACC() for CAL_DATA_RB control Use the new SND_SOC_BYTES_E_ACC() macro instead of SND_SOC_BYTES_E() to define the CAL_DATA_RB control, so that it is marked as read-only and volatile. This avoids userland code expecting to be able to write to it and then getting an unexpected EPERM error, or assuming that its value can never change. Signed-off-by: Richard Fitzgerald Link: https://patch.msgid.link/20251120134437.1179191-5-rf@opensource.cirrus.com Signed-off-by: Mark Brown --- sound/soc/codecs/cs35l56.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c index f5fd20c8cce1a..d8a3babce0f6d 100644 --- a/sound/soc/codecs/cs35l56.c +++ b/sound/soc/codecs/cs35l56.c @@ -1099,8 +1099,9 @@ static int cs35l56_cal_data_ctl_set(struct snd_kcontrol *kcontrol, static const struct snd_kcontrol_new cs35l56_cal_data_restore_controls[] = { SND_SOC_BYTES_E("CAL_DATA", 0, sizeof(struct cirrus_amp_cal_data) / sizeof(u32), cs35l56_cal_data_ctl_get, cs35l56_cal_data_ctl_set), - SND_SOC_BYTES_E("CAL_DATA_RB", 0, sizeof(struct cirrus_amp_cal_data) / sizeof(u32), - cs35l56_cal_data_rb_ctl_get, NULL), + SND_SOC_BYTES_E_ACC("CAL_DATA_RB", 0, sizeof(struct cirrus_amp_cal_data) / sizeof(u32), + cs35l56_cal_data_rb_ctl_get, NULL, + SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE), }; static int cs35l56_set_fw_suffix(struct cs35l56_private *cs35l56) -- 2.47.3