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authorPawel MOLL <pawel.moll@st.com>2008-07-30 15:46:40 +0400
committerJaroslav Kysela <perex@perex.cz>2008-08-01 15:37:15 +0400
commitf90c06a2b613eea24a77d56f24b084745c43713d (patch)
tree9a205486e526c9f5b696db96633e1a7ff7833a7c /include/sound/minors.h
parent030a07e441296c372f946cd4065b5d831d8dc40c (diff)
downloadlinux-f90c06a2b613eea24a77d56f24b084745c43713d.tar.xz
ALSA: Fix limit of 8 PCM devices in SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE
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. Additionally the device field of struct snd_pcm had to be changed to int, as its "unsignednity" caused a lot of problems when comparing it to potentially negative signed values. (-1 is 0xffffffff or even more then ;-) Signed-off-by: Pawel Moll <pawel.moll@st.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'include/sound/minors.h')
-rw-r--r--include/sound/minors.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sound/minors.h b/include/sound/minors.h
index 46bcd2023ed8..a81798ab73ed 100644
--- a/include/sound/minors.h
+++ b/include/sound/minors.h
@@ -21,6 +21,8 @@
*
*/
+#define SNDRV_OS_MINORS 256
+
#define SNDRV_MINOR_DEVICES 32
#define SNDRV_MINOR_CARD(minor) ((minor) >> 5)
#define SNDRV_MINOR_DEVICE(minor) ((minor) & 0x001f)