bcm2835_audio_callback: Don't process garbage if there is no message.

If vchi_msg_dequeue failed due to an empty queue, return rather than
treating stack garbage as a valid message.

This commit is contained in:

John Baldwin

2022-04-08 18:31:29 -07:00

parent 4b9b6a501a

commit 4f6be8c788

1 changed files with 2 additions and 0 deletions

									
										sys/arm/broadcom/bcm2835/bcm2835_audio.c
									
		+2
		
												View File
												
				@@ -207,6 +207,8 @@ bcm2835_audio_callback(void *param, const VCHI_CALLBACK_REASON_T reason, void *m

					status = vchi_msg_dequeue(sc->vchi_handle,

					    &m, sizeof m, &msg_len, VCHI_FLAGS_NONE);

					if (status != 0)

						return;

					if (m.type == VC_AUDIO_MSG_TYPE_RESULT) {

						if (m.u.result.success) {

							device_printf(sc->dev,