• Pawel MOLL's avatar
    ALSA: Fix limit of 8 PCM devices in SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE · 94239690
    Pawel MOLL authored
    When compiled with CONFIG_SND_DYNAMIC_MINORS the ALSA core is fine
    to have more than 8 PCM devices per card, except one place - the
    SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE ioctl, which will not enumerate
    devices > 7. This patch fixes the issue, changing the devices list
    organisation.
    
    Instead of adding new device to the tail, the list is now kept always
    ordered (by card number, then device number). Thus, during enumeration,
    it is easy to discover the fact that there is no more given card's
    devices. The same limit was present in OSS emulation code. It has
    been fixed as well.
    
    Additionally the device field of struct snd_pcm is now int, instead of
    unsigned int, as there is no obvious reason for keeping it unsigned.
    This caused a lot of problems with comparing this value with other
    (almost always signed) variables. There is just one more place where
    device number is unsigned - in struct snd_pcm_info, which should be
    also sorted out in future.
    Signed-off-by: default avatarPawel MOLL <pawel.moll@st.com>
    Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
    94239690
minors.h 4.22 KB