[alsa-devel] ALSA: hda - Fix internal mic for Lenovo Ideapad U300s

[David Henningsson]

On 04/10/2012 10:37 AM, Dan Carpenter wrote:
> Hello David Henningsson,
>
> This is a semi-automatic email about new static checker warnings.
>
> The patch 18dcd3044e4c: "ALSA: hda - Fix internal mic for Lenovo
> Ideapad U300s" from Apr 2, 2012, leads to the following Smatch
> complaint:
>
> sound/pci/hda/patch_conexant.c:4449 apply_fixup()
> 	 error: we previously assumed 'quirk' could be null (see line 4444)

Thanks for spotting - will provide patch shortly.


>
> sound/pci/hda/patch_conexant.c
>    4443		quirk = snd_pci_quirk_lookup(codec->bus->pci, quirk);
>    4444		if (quirk&&  table[quirk->value]) {
>                      ^^^^^
> Old check.
>
>    4445			snd_printdd(KERN_INFO "hda_codec: applying pincfg for %s\n",
>    4446				    quirk->name);
>    4447			apply_pincfg(codec, table[quirk->value]);
>    4448		}
>    4449		if (quirk->value == CXT_FIXUP_STEREO_DMIC) {
>                      ^^^^^^^^^^^^
> New unchecked dereference.
>
>    4450			snd_printdd(KERN_INFO "hda_codec: applying internal mic workaround for %s\n",
>    4451				    quirk->name);
>
> regards,
> dan carpenter
>



-- 
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic