From: Libin Yang libin.yang@linux.intel.com

This patch fixes some warnings from klockwork.

These warnings are not the real issues. The patch adds the sanity check.

Signed-off-by: Libin Yang libin.yang@linux.intel.com --- sound/hda/hdmi_chmap.c | 28 +++++++++++++++++++++++++--- sound/pci/hda/hda_codec.c | 8 +++++++- sound/pci/hda/patch_hdmi.c | 5 +++++ 3 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/sound/hda/hdmi_chmap.c b/sound/hda/hdmi_chmap.c index c6c75e7..81acc20 100644 --- a/sound/hda/hdmi_chmap.c +++ b/sound/hda/hdmi_chmap.c @@ -353,7 +353,8 @@ static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap, int hdmi_slot = 0; /* fill actual channel mappings in ALSA channel (i) order */ for (i = 0; i < ch_alloc->channels; i++) { - while (!ch_alloc->speakers[7 - hdmi_slot] && !WARN_ON(hdmi_slot >= 8)) + while (!WARN_ON(hdmi_slot >= 8) && + !ch_alloc->speakers[7 - hdmi_slot]) hdmi_slot++; /* skip zero slots */

hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++; @@ -430,6 +431,12 @@ static int to_cea_slot(int ordered_ca, unsigned char pos) int mask = snd_hdac_chmap_to_spk_mask(pos); int i;

+ /* Add sanity check to pass klockwork check. + * This should never happen. + */ + if (ordered_ca >= ARRAY_SIZE(channel_allocations)) + return -1; + if (mask) { for (i = 0; i < 8; i++) { if (channel_allocations[ordered_ca].speakers[7 - i] == mask) @@ -456,7 +463,15 @@ EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap); /* from CEA slot to ALSA API channel position */ static int from_cea_slot(int ordered_ca, unsigned char slot) { - int mask = channel_allocations[ordered_ca].speakers[7 - slot]; + int mask; + + /* Add sanity check to pass klockwork check. + * This should never happen. + */ + if (slot >= 8) + return 0; + + mask = channel_allocations[ordered_ca].speakers[7 - slot];

return snd_hdac_spk_to_chmap(mask); } @@ -523,7 +538,8 @@ static void hdmi_setup_fake_chmap(unsigned char *map, int ca) int ordered_ca = get_channel_allocation_order(ca);

for (i = 0; i < 8; i++) { - if (i < channel_allocations[ordered_ca].channels) + if (ordered_ca < ARRAY_SIZE(channel_allocations) && + i < channel_allocations[ordered_ca].channels) map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f); else map[i] = 0; @@ -551,6 +567,12 @@ int snd_hdac_get_active_channels(int ca) { int ordered_ca = get_channel_allocation_order(ca);

+ /* Add sanity check to pass klockwork check. + * This should never happen. + */ + if (ordered_ca >= ARRAY_SIZE(channel_allocations)) + ordered_ca = 0; + return channel_allocations[ordered_ca].channels; } EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels); diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 8374188..9913be8 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3584,6 +3584,12 @@ static void setup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid, bool reset;

spdif = snd_hda_spdif_out_of_nid(codec, nid); + /* Add sanity check to pass klockwork check. + * This should never happen. + */ + if (WARN_ON(spdif == NULL)) + return; + curr_fmt = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_STREAM_FORMAT, 0); reset = codec->spdif_status_reset && @@ -3768,7 +3774,7 @@ int snd_hda_multi_out_analog_prepare(struct hda_codec *codec, spdif = snd_hda_spdif_out_of_nid(codec, mout->dig_out_nid); if (mout->dig_out_nid && mout->share_spdif && mout->dig_out_used != HDA_DIG_EXCLUSIVE) { - if (chs == 2 && + if (chs == 2 && spdif != NULL && snd_hda_is_supported_format(codec, mout->dig_out_nid, format) && !(spdif->status & IEC958_AES0_NONAUDIO)) { diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index d0d5ad8..56e5204 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1680,6 +1680,11 @@ static bool check_non_pcm_per_cvt(struct hda_codec *codec, hda_nid_t cvt_nid)

mutex_lock(&codec->spdif_mutex); spdif = snd_hda_spdif_out_of_nid(codec, cvt_nid); + /* Add sanity check to pass klockwork check. + * This should never happen. + */ + if (WARN_ON(spdif == NULL)) + return true; non_pcm = !!(spdif->status & IEC958_AES0_NONAUDIO); mutex_unlock(&codec->spdif_mutex); return non_pcm;