patch "staging: greybus: Add missing rwsem around snd_ctl_remove() calls" added to staging-linus

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

staging: greybus: Add missing rwsem around snd_ctl_remove() calls

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From ffcf7ae90f4489047d7b076539ba207024dea5f6 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <[email protected]>
Date: Tue, 16 Nov 2021 08:20:27 +0100
Subject: staging: greybus: Add missing rwsem around snd_ctl_remove() calls

snd_ctl_remove() has to be called with card->controls_rwsem held (when called after the card instantiation). This patch adds the missing rwsem calls around it.

---
 drivers/staging/greybus/audio_helper.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

index 1ed4772d2771..843760675876 100644
@@ -192,7 +192,11 @@ int gbaudio_remove_component_controls(struct snd_soc_component *component,
 				      unsigned int num_controls)
 {
 	struct snd_card *card = component->card->snd_card;
+	int err;
 
-	return gbaudio_remove_controls(card, component->dev, controls,
-				       num_controls, component->name_prefix);
+	down_write(&card->controls_rwsem);
+	err = gbaudio_remove_controls(card, component->dev, controls,
+				      num_controls, component->name_prefix);
+	up_write(&card->controls_rwsem);
+	return err;
 }

2.34.0