• Jaroslav Kysela's avatar
    ALSA: pcm_lib - return back hw_ptr_interrupt · e7636925
    Jaroslav Kysela authored
    Clemens Ladisch noted for hw_ptr_removal in "cleanup & merge hw_ptr
    update functions" commit:
    "It is possible for the status/delay ioctls to be called when the sound
    card's pointer register alreay shows a position at the beginning of the
    new period, but immediately before the interrupt is actually executed.
    (This happens regularly on a SMP machine with mplayer.)  When that
    happens, the code thinks that the position must be at least one period
    ahead of the current position and drops an entire buffer of data."
    Return back the hw_ptr_interrupt variable. The last interrupt pointer
    is always computed from the latest hw_ptr instead of tracking it
    separately (in this case all hw_ptr checks and modifications might
    influence also hw_ptr_interrupt and it is difficult to keep it
    Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>