This reverts commit 
57a04513cb35086d54bcb2cb92e6627fc8fa0fae.
Harald Dunkel reports that it broke sound for him:
  "Alsa stopped working for me.  I still can access /dev/dsp, change the
   volume and so on, but the speakers are quiet."
Reverting it fixed things for him.
Reported-and-tested-by: Harald Dunkel <harald.dunkel@t-online.de>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
                }
                if (!chip->rirb.cmds)
                        return chip->rirb.res; /* the last value */
-               udelay(10);
-               cond_resched();
+               schedule_timeout_uninterruptible(1);
        } while (time_after_eq(timeout, jiffies));
 
        if (chip->msi) {