2 files changed, 23 insertions, 8 deletions

diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
index 656e474dca47..91acc9a243ec 100644
--- a/sound/arm/aaci.c
+++ b/sound/arm/aaci.c
@@ -863,7 +863,6 @@ static int __devinit aaci_probe_ac97(struct aaci *aaci)
         struct snd_ac97 *ac97;
         int ret;
 
-        writel(0, aaci->base + AC97_POWERDOWN);
         /*
          * Assert AACIRESET for 2us
          */
@@ -1047,7 +1046,11 @@ static int __devinit aaci_probe(struct amba_device *dev, struct amba_id *id)
 
         writel(0x1fff, aaci->base + AACI_INTCLR);
         writel(aaci->maincr, aaci->base + AACI_MAINCR);
-
+        /*
+         * Fix: ac97 read back fail errors by reading
+         * from any arbitrary aaci register.
+         */
+        readl(aaci->base + AACI_CSCH1);
         ret = aaci_probe_ac97(aaci);
         if (ret)
                 goto out;
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 2c59afd99611..9e28b20cb2ce 100644
--- a/sound/usb/usbmidi.c
+++ b/sound/usb/usbmidi.c
@@ -986,6 +986,8 @@ static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
         DEFINE_WAIT(wait);
         long timeout = msecs_to_jiffies(50);
 
+        if (ep->umidi->disconnected)
+                return;
         /*
          * The substream buffer is empty, but some data might still be in the
          * currently active URBs, so we have to wait for those to complete.
@@ -1123,14 +1125,21 @@ static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi* umidi,
  * Frees an output endpoint.
  * May be called when ep hasn't been initialized completely.
  */
-static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint* ep)
+static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
 {
         unsigned int i;
 
         for (i = 0; i < OUTPUT_URBS; ++i)
-                if (ep->urbs[i].urb)
+                if (ep->urbs[i].urb) {
                         free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
                                             ep->max_transfer);
+                        ep->urbs[i].urb = NULL;
+                }
+}
+
+static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
+{
+        snd_usbmidi_out_endpoint_clear(ep);
         kfree(ep);
 }
 
@@ -1262,15 +1271,18 @@ void snd_usbmidi_disconnect(struct list_head* p)
                                 usb_kill_urb(ep->out->urbs[j].urb);
                         if (umidi->usb_protocol_ops->finish_out_endpoint)
                                 umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
+                        ep->out->active_urbs = 0;
+                        if (ep->out->drain_urbs) {
+                                ep->out->drain_urbs = 0;
+                                wake_up(&ep->out->drain_wait);
+                        }
                 }
                 if (ep->in)
                         for (j = 0; j < INPUT_URBS; ++j)
                                 usb_kill_urb(ep->in->urbs[j]);
                 /* free endpoints here; later call can result in Oops */
-                if (ep->out) {
-                        snd_usbmidi_out_endpoint_delete(ep->out);
-                        ep->out = NULL;
-                }
+                if (ep->out)
+                        snd_usbmidi_out_endpoint_clear(ep->out);
                 if (ep->in) {
                         snd_usbmidi_in_endpoint_delete(ep->in);
                         ep->in = NULL;