Previously, it was possible to read the eld data of the previous monitor connected. This should not be allowed.
Also refactor the function slightly.
Signed-off-by: David Henningsson david.henningsson@canonical.com --- sound/pci/hda/patch_hdmi.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 32adaa6..9236cdb 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -343,14 +343,17 @@ static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct hda_codec *codec = snd_kcontrol_chip(kcontrol); - struct hdmi_spec *spec; + struct hdmi_spec *spec = codec->spec; + struct hdmi_eld *eld; int pin_idx;
- spec = codec->spec; uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
pin_idx = kcontrol->private_value; - uinfo->count = spec->pins[pin_idx].sink_eld.eld_size; + eld = &spec->pins[pin_idx].sink_eld; + + if (eld->eld_valid) + uinfo->count = eld->eld_valid ? eld->eld_size : 0;
return 0; } @@ -359,14 +362,21 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct hda_codec *codec = snd_kcontrol_chip(kcontrol); - struct hdmi_spec *spec; + struct hdmi_spec *spec = codec->spec; + struct hdmi_eld *eld; int pin_idx;
- spec = codec->spec; pin_idx = kcontrol->private_value; + eld = &spec->pins[pin_idx].sink_eld; + + if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data)) { + snd_BUG(); + return -EINVAL; + }
- memcpy(ucontrol->value.bytes.data, - spec->pins[pin_idx].sink_eld.eld_buffer, ELD_MAX_SIZE); + if (eld->eld_valid) + memcpy(ucontrol->value.bytes.data, eld->eld_buffer, + eld->eld_size);
return 0; }