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[2/4] ASoC: wm_adsp: Explicitly set the control access flags in all cases

Message ID 1455893084-4556-2-git-send-email-ckeepax@opensource.wolfsonmicro.com (mailing list archive)
State Accepted
Commit cc815c4b86d14630a7d4ca4f4c7d2c2acb88cb52
Headers show

Commit Message

Charles Keepax Feb. 19, 2016, 2:44 p.m. UTC
In the case where the firmware does not tell us the access flags for the
control, we let ALSA select a default (READWRITE). But really we should
be applying the volatile flag in this case, as we will read the control
from the DSP if it is on in this case. This patch explicitly sets the
access flags in all cases.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/wm_adsp.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 00a7d68..c97b3a1 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -877,6 +877,9 @@  static int wmfw_add_ctl(struct wm_adsp *dsp, struct wm_coeff_ctl *ctl)
 			kcontrol->access |= SNDRV_CTL_ELEM_ACCESS_READ;
 		if (ctl->flags & WMFW_CTL_FLAG_VOLATILE)
 			kcontrol->access |= SNDRV_CTL_ELEM_ACCESS_VOLATILE;
+	} else {
+		kcontrol->access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
+		kcontrol->access |= SNDRV_CTL_ELEM_ACCESS_VOLATILE;
 	}
 
 	ret = snd_soc_add_card_controls(dsp->card,