target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch

   1 --- a/arch/mips/bcm47xx/setup.c
   2 +++ b/arch/mips/bcm47xx/setup.c
   3 @@ -35,6 +35,7 @@
   4  #include <asm/prom.h>
   5  #include <asm/reboot.h>
   6  #include <asm/time.h>
   7 +#include <asm/idle.h>
   8  #include <bcm47xx.h>
   9  #include <bcm47xx_nvram.h>
  10  #include <bcm47xx_board.h>
  11 @@ -214,6 +215,15 @@ static void __init bcm47xx_register_bcma
  12                 panic("Failed to initialize BCMA bus (err %d)", err);
  13
  14         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
  15 +
  16 +       /* The BCM4706 has a problem with the CPU wait instruction.
  17 +        * When r4k_wait or r4k_wait_irqoff is used will just hang and
  18 +        * not return from a msleep(). Removing the cpu_wait
  19 +        * functionality is a workaround for this problem. The BCM4716
  20 +        * does not have this problem.
  21 +        */
  22 +       if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
  23 +               cpu_wait = NULL;
  24  }
  25  #endif
  26