From 3a90274de3548ebb2aabfbf488cea8e275a73dc6 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 10 Jan 2012 12:41:22 +0100 Subject: 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 --- sound/pci/hda/hda_local.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'sound/pci/hda/hda_local.h') diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index e1abc07f7436..aca8d3193b95 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) { -- cgit v1.2.3