target/linux/omap24xx/patches-2.6.38/506-cbus-retu-irq-handler-locking.patch

   1 --- a/drivers/cbus/retu.c
   2 +++ b/drivers/cbus/retu.c
   3 @@ -198,10 +198,12 @@ static irqreturn_t retu_irq_handler(int
   4         u16                     idr;
   5         u16                     imr;
   6
   7 +       mutex_lock(&retu->mutex);
   8         idr = __retu_read_reg(retu, RETU_REG_IDR);
   9         imr = __retu_read_reg(retu, RETU_REG_IMR);
  10 -       idr &= ~imr;
  11 +       mutex_unlock(&retu->mutex);
  12
  13 +       idr &= ~imr;
  14         if (!idr) {
  15                 dev_vdbg(retu->dev, "No IRQ, spurious?\n");
  16                 return IRQ_NONE;