Hi,
I'm trying the hwdep interface with poll().
looking for reasons why removal of USB-device caused bad MAGIC in hwdep.c,
I found this solution:
<PATCH>
--- alsa-driver-0.9.6/acore/hwdep.c 2003-07-30 01:01:23.000000000 +0200
+++ alsa-driver-0.9.6-patched/acore/hwdep.c 2003-09-04 17:45:59.000000000
+0200
@@ -133,9 +133,14 @@
set_current_state(TASK_RUNNING);
remove_wait_queue(&hw->open_wait, &wait);
if (err >= 0) {
+ err = snd_card_file_add(hw->card, file);
+ if (err < 0)
+ return -ENODEV;
+
file->private_data = hw;
hw->used++;
}
+
up(&hw->open_mutex);
return err;
}
@@ -151,6 +156,7 @@
}
if (hw->used > 0)
hw->used--;
+ snd_card_file_remove(hw->card, file);
up(&hw->open_mutex);
return -ENXIO;
}
</PATCH>
Also in Web-CVS this part of the code seams not to have the snd_card_file*
calls.
"It works for me" here. If it is correct, please apply!
regards,
Karsten
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