diff mbox series

ALSA: usb-audio: Check shutdown at endpoint_set_interface()

Message ID 20240808091522.31415-1-tiwai@suse.de (mailing list archive)
State New, archived
Headers show
Series ALSA: usb-audio: Check shutdown at endpoint_set_interface() | expand

Commit Message

Takashi Iwai Aug. 8, 2024, 9:15 a.m. UTC 
The call of usb_set_interface() and a delay are superfluous when the
device has been already disconnected.  Add a disconnection check
before doing it.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/endpoint.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 8f65349a06d3..568099467dbb 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -921,6 +921,9 @@  static int endpoint_set_interface(struct snd_usb_audio *chip,
 
 	if (ep->iface_ref->altset == altset)
 		return 0;
+	/* already disconnected? */
+	if (unlikely(atomic_read(&chip->shutdown)))
+		return -ENODEV;
 
 	usb_audio_dbg(chip, "Setting usb interface %d:%d for EP 0x%x\n",
 		      ep->iface, altset, ep->ep_num);