[PATCH] usbaudio: prevent oops & dead keyboard on usb unplugging while the device is being used

Without this patch, some usb kobjects, which are parents to the usx2y's kobjects can be freed before the usx2y's. This led to an oops in get_kobj_path_length() and a dead keyboard, when the usx2y's kobjects were freed. The patch ensures the correct sequence. Tested ok on kernel 2.6.12-rc2. Present in ALSA cvs

Karsten Wiese committed 21 years ago

Commit efa93db1 parent 9a476961 file · +1 −1Browse files

Unified · Split

sound/usb/usbaudio.c+1−1

@@ -3289,7 +3289,7 @@ static void snd_usb_audio_disconnect(struct usb_device dev, void ptr) · 3288 unmodified lines
3289	}	3289	}
3290	usb_chip[chip->index] = NULL;	3290	usb_chip[chip->index] = NULL;
3291	up(&register_mutex);	3291	up(&register_mutex);
3292	snd_card_free_in_thread(card);	3292	snd_card_free(card);
3293	} else {	3293	} else {
3294	up(&register_mutex);	3294	up(&register_mutex);
3295	}	3295	}