From: Takashi Iwai Date: Tue, 10 Jan 2012 11:41:22 +0000 (+0100) Subject: ALSA: hda - Return the error from get_wcaps_type() for invalid NIDs X-Git-Tag: v3.3-rc1~32^2~6^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3a90274de3548ebb2aabfbf488cea8e275a73dc6;p=platform%2Fkernel%2Flinux-stable.git ALSA: hda - Return the error from get_wcaps_type() for invalid NIDs 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 Cc: Signed-off-by: Takashi Iwai --- diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index e1abc07..aca8d31 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -488,7 +488,12 @@ 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 2c981b5..254ab52 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];