[ 22/38] ALSA: Add a reference counter to card instance

3.0-stable review patch. If anyone has any objections, please let me know. -- From: Takashi Iwai commit a0830dbd4e42b38aefdf3fb61ba5019a1a99ea85 upstream. For more strict protection for wild disconnections, a refcount is introduced to the card instance, and let it up/down

[ 22/38] ALSA: Add a reference counter to card instance

3.0-stable review patch. If anyone has any objections, please let me know. -- From: Takashi Iwai ti...@suse.de commit a0830dbd4e42b38aefdf3fb61ba5019a1a99ea85 upstream. For more strict protection for wild disconnections, a refcount is introduced to the card instance, and let