package/kernel/lantiq/ltq-vdsl-mei/patches/200-interrupt-lock.patch

   1 --- a/src/drv_mei_cpe_common.c
   2 +++ b/src/drv_mei_cpe_common.c
   3 @@ -104,6 +104,8 @@ IFX_uint32_t MEI_FsmStateSetMsgPreAction
   4  MEI_DEVCFG_DATA_T MEI_DevCfgData;
   5  #endif
   6
   7 +static DEFINE_SPINLOCK(MEI_InterruptLock);
   8 +
   9  /* ============================================================================
  10     Proc-FS and debug variable definitions
  11     ========================================================================= */
  12 @@ -2134,6 +2136,9 @@ IFX_int32_t MEI_ProcessIntPerIrq(MEIX_CN
  13  #if (MEI_SUPPORT_DEBUG_STREAMS == 1)
  14     IFX_int_t   extraDbgStreamLoop = 0;
  15  #endif
  16 +   unsigned long flags;
  17 +
  18 +   spin_lock_irqsave(&MEI_InterruptLock, flags);
  19
  20     /* get the actual chip device from the list and step through the VRX devices */
  21     while(pNextXCntrl)
  22 @@ -2167,6 +2172,8 @@ IFX_int32_t MEI_ProcessIntPerIrq(MEIX_CN
  23     }
  24  #endif
  25
  26 +   spin_unlock_irqrestore(&MEI_InterruptLock, flags);
  27 +
  28     return meiIntCnt;
  29  }
  30
  31 @@ -2639,9 +2646,14 @@ IFX_int32_t MEI_MsgSendPreAction(
  32  */
  33  IFX_void_t MEI_DisableDeviceInt(MEI_DEV_T *pMeiDev)
  34  {
  35 +   unsigned long flags;
  36 +   spin_lock_irqsave(&MEI_InterruptLock, flags);
  37 +
  38     MEI_MaskInterrupts( &pMeiDev->meiDrvCntrl,
  39                         ME_ARC2ME_INTERRUPT_MASK_ALL);
  40
  41 +   spin_unlock_irqrestore(&MEI_InterruptLock, flags);
  42 +
  43     return;
  44  }
  45