• Takashi Iwai's avatar
    ALSA: core: Fix unexpected error at replacing user TLV · 88c54cdf
    Takashi Iwai authored
    When user tries to replace the user-defined control TLV, the kernel
    checks the change of its content via memcmp().  The problem is that
    the kernel passes the return value from memcmp() as is.  memcmp()
    gives a non-zero negative value depending on the comparison result,
    and this shall be recognized as an error code.
    
    The patch covers that corner-case, return 1 properly for the changed
    TLV.
    
    Fixes: 8aa9b586 ("[ALSA] Control API - more robust TLV implementation")
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    88c54cdf
control.c 49.7 KB