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| author | Takashi Iwai <tiwai@suse.de> | 2012-01-10 12:41:22 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-01-10 12:41:22 +0100 |
| commit | 3a90274de3548ebb2aabfbf488cea8e275a73dc6 (patch) | |
| tree | 062bf3d12a3db01de80533b58f25a0eac6149060 /sound/pci/hda/hda_local.h | |
| parent | de4da59e480cdf1075b33dbaf8078fc87bc52241 (diff) | |
| download | blackbird-op-linux-3a90274de3548ebb2aabfbf488cea8e275a73dc6.tar.gz blackbird-op-linux-3a90274de3548ebb2aabfbf488cea8e275a73dc6.zip | |
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: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_local.h')
| -rw-r--r-- | sound/pci/hda/hda_local.h | 7 |
1 files changed, 6 insertions, 1 deletions
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) { |
