diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-01-10 12:41:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-25 17:24:34 -0800 |
| commit | 24973a17310bd933969d79cf4080049df85aff2c (patch) | |
| tree | 116ea3413c3770c20cbf270edeee20e0e907a437 /sound | |
| parent | 35cdd5ea88762e22c9d21c5c826cbd7ef1edd7db (diff) | |
ALSA: hda - Return the error from get_wcaps_type() for invalid NIDs
commit 3a90274de3548ebb2aabfbf488cea8e275a73dc6 upstream.
When an invalid NID is given, get_wcaps() returns zero as the error,
but get_wcaps_type() takes it as the normal value and returns a bogus
AC_WID_AUD_OUT value. This confuses the parser.
With this patch, get_wcaps_type() returns -1 when value 0 is given,
i.e. an invalid NID is passed to get_wcaps().
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=740118
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_local.h | 7 | ||||
| -rw-r--r-- | sound/pci/hda/hda_proc.c | 2 |
2 files changed, 8 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index 08ec073444e2..e289a13c4889 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -474,7 +474,12 @@ static inline u32 get_wcaps(struct hda_codec *codec, hda_nid_t nid) } /* get the widget type from widget capability bits */ -#define get_wcaps_type(wcaps) (((wcaps) & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT) +static inline int get_wcaps_type(unsigned int wcaps) +{ + if (!wcaps) + return -1; /* invalid type */ + return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT; +} static inline unsigned int get_wcaps_channels(u32 wcaps) { diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c index bfe74c2fb079..6fe944a386c2 100644 --- a/sound/pci/hda/hda_proc.c +++ b/sound/pci/hda/hda_proc.c @@ -54,6 +54,8 @@ static const char *get_wid_type_name(unsigned int wid_value) [AC_WID_BEEP] = "Beep Generator Widget", [AC_WID_VENDOR] = "Vendor Defined Widget", }; + if (wid_value == -1) + return "UNKNOWN Widget"; wid_value &= 0xf; if (names[wid_value]) return names[wid_value]; |