ALSA: seq: Wait for one RCU grace period when deleting all ports

Since the port list was converted to RCU, snd_seq_delete_all_ports()
calls synchronize_rcu() once per port under register_mutex. Closing a
client with 254 ports now takes about 1.6s and every other client
open or close waits for it.

Unlink all ports first, wait for a single grace period and then free
them.

Fixes: 4c252fbc06d6 ("ALSA: seq: Use RCU for the client port list")
Signed-off-by: Ali Ahmet Memiş <aliamemis@disroot.org>
Link: https://patch.msgid.link/20261010222543.1470723-1-aliamemis@disroot.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>

0 files changed, 0 insertions, 0 deletions