alsa: pcm: Remove the qos request only if active

Fixes warning:

[    8.502802] ------------[ cut here ]------------
[    8.503445] cpu_latency_qos_remove_request called for unknown object
[    8.504269] WARNING: CPU: 5 PID: 2790 at kernel/power/qos.c:322 cpu_latency_qos_remove_request+0x48/0x98
[    8.505499] CPU: 5 PID: 2790 Comm: wireplumber Tainted: G        W          6.5.0-asahi-00708-gb9b88240f7ae #2291
[    8.506777] Hardware name: Apple MacBook Air (13-inch, M2, 2022) (DT)
<snip regs>
[    8.519099] Call trace:
[    8.519402]  cpu_latency_qos_remove_request+0x48/0x98
[    8.520027]  snd_pcm_ioctl+0x86c/0x182c
[    8.520519]  __arm64_sys_ioctl+0xf8/0xbd0
[    8.521020]  invoke_syscall.constprop.0+0x78/0xc8
[    8.521604]  do_el0_svc+0x58/0x154
[    8.522026]  el0_svc+0x34/0xe4
[    8.522409]  el0t_64_sync_handler+0x120/0x12c
[    8.522951]  el0t_64_sync+0x190/0x194
[    8.523408] ---[ end trace 0000000000000000 ]---

Signed-off-by: Hector Martin <marcan@marcan.st>

Author: marcan

sound/core/pcm_native.c

@@ -939,8 +939,9 @@ static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 		goto unlock;
 	result = do_hw_free(substream);
 	snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
-	cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
- unlock:
+	if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
+		cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
+unlock:
 	snd_pcm_buffer_access_unlock(runtime);
 	return result;
 }