From: Anssi Hannula Date: Sun, 10 Nov 2013 18:56:10 +0000 (+0200) Subject: ALSA: hda - hdmi: Add error-checking to some codec reads X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=13122e6ebf24d9f676d8a40edc2e9a265e89b628;p=linux-beck.git ALSA: hda - hdmi: Add error-checking to some codec reads Add error checks to HBR status reads (both generic and ATI/AMD) and ATI/AMD codec reads for ELD generation. Unchecked errors in these just caused more errors later on (invalid codec writes for the HBR ones and ELD parsing errors for the ATI/AMD ELD ones), but it is better to catch them earlier. Signed-off-by: Anssi Hannula Signed-off-by: Takashi Iwai --- diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c index 32d3e3855a6e..e8c55f5a34ff 100644 --- a/sound/pci/hda/hda_eld.c +++ b/sound/pci/hda/hda_eld.c @@ -680,7 +680,7 @@ int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid, spkalloc = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_SPEAKER_ALLOCATION, 0); - if (!spkalloc) { + if (spkalloc <= 0) { snd_printd(KERN_INFO "HDMI ATI/AMD: no speaker allocation for ELD\n"); return -EINVAL; } @@ -742,6 +742,9 @@ int snd_hdmi_get_eld_ati(struct hda_codec *codec, hda_nid_t nid, snd_hda_codec_write(codec, nid, 0, ATI_VERB_SET_AUDIO_DESCRIPTOR, i << 3); ati_sad = snd_hda_codec_read(codec, nid, 0, ATI_VERB_GET_AUDIO_DESCRIPTOR, 0); + if (ati_sad <= 0) + continue; + if (ati_sad & ATI_AUDIODESC_RATES) { /* format is supported, copy SAD as-is */ buf[pos++] = (ati_sad & 0x0000ff) >> 0; diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 8aa104cba241..08407bed093e 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1247,6 +1247,9 @@ static int hdmi_pin_hbr_setup(struct hda_codec *codec, hda_nid_t pin_nid, pinctl = snd_hda_codec_read(codec, pin_nid, 0, AC_VERB_GET_PIN_WIDGET_CONTROL, 0); + if (pinctl < 0) + return hbr ? -EINVAL : 0; + new_pinctl = pinctl & ~AC_PINCTL_EPT; if (hbr) new_pinctl |= AC_PINCTL_EPT_HBR; @@ -3091,7 +3094,7 @@ static int atihdmi_pin_hbr_setup(struct hda_codec *codec, hda_nid_t pin_nid, int hbr_ctl, hbr_ctl_new; hbr_ctl = snd_hda_codec_read(codec, pin_nid, 0, ATI_VERB_GET_HBR_CONTROL, 0); - if (hbr_ctl & ATI_HBR_CAPABLE) { + if (hbr_ctl >= 0 && (hbr_ctl & ATI_HBR_CAPABLE)) { if (hbr) hbr_ctl_new = hbr_ctl | ATI_HBR_ENABLE; else