Patch "ALSA: PCM: Allow resume only for suspended streams" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    ALSA: PCM: Allow resume only for suspended streams

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     alsa-pcm-allow-resume-only-for-suspended-streams.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit bc4330016931261657a21ec9cfd0fa89b9a662e9
Author: Takashi Iwai <tiwai@xxxxxxx>
Date:   Mon Jun 24 14:54:34 2024 +0200

    ALSA: PCM: Allow resume only for suspended streams
    
    [ Upstream commit 1225675ca74c746f09211528588e83b3def1ff6a ]
    
    snd_pcm_resume() should bail out if the stream isn't in a suspended
    state.  Otherwise it'd allow doubly resume.
    
    Link: https://patch.msgid.link/20240624125443.27808-1-tiwai@xxxxxxx
    Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index bd9ddf412b465..cc21c483c4a57 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1783,6 +1783,8 @@ static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
 			      snd_pcm_state_t state)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
+	if (runtime->state != SNDRV_PCM_STATE_SUSPENDED)
+		return -EBADFD;
 	if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
 		return -ENOSYS;
 	runtime->trigger_master = substream;




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