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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>
This commit is contained in:
Takashi Iwai 2012-01-10 12:41:22 +01:00
parent de4da59e48
commit 3a90274de3
2 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
sound/pci/hda/hda_local.h
View File

@ -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)
{

2
sound/pci/hda/hda_proc.c
View File

@ -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];