iop-adma: use iop_paranoia() for debug BUG_ONs

Now that the critical read back to flush the next descriptor address is
fixed we can downgrade some BUG_ONs that need only be enabled when testing
changes to the driver.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

4 files changed, 12 insertions, 4 deletions

diff --git a/arch/arm/include/asm/hardware/iop3xx-adma.h b/arch/arm/include/asm/hardware/iop3xx-adma.h
index 87bff09633aa..83e6ba338e2c 100644
--- a/arch/arm/include/asm/hardware/iop3xx-adma.h
+++ b/arch/arm/include/asm/hardware/iop3xx-adma.h
@@ -730,7 +730,8 @@ static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
 {
         /* hw_desc->next_desc is the same location for all channels */
         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-        BUG_ON(hw_desc.dma->next_desc);
+
+        iop_paranoia(hw_desc.dma->next_desc);
         hw_desc.dma->next_desc = next_desc_addr;
 }
 
@@ -760,7 +761,7 @@ static inline int iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
         struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
         struct iop3xx_aau_desc_ctrl desc_ctrl = hw_desc->desc_ctrl_field;
 
-        BUG_ON(!(desc_ctrl.tx_complete && desc_ctrl.zero_result_en));
+        iop_paranoia(!(desc_ctrl.tx_complete && desc_ctrl.zero_result_en));
         return desc_ctrl.zero_result_err;
 }
 
diff --git a/arch/arm/include/asm/hardware/iop_adma.h b/arch/arm/include/asm/hardware/iop_adma.h
index cb7e3611bcba..385c6e8cbbd2 100644
--- a/arch/arm/include/asm/hardware/iop_adma.h
+++ b/arch/arm/include/asm/hardware/iop_adma.h
@@ -23,6 +23,12 @@
 
 #define IOP_ADMA_SLOT_SIZE 32
 #define IOP_ADMA_THRESHOLD 4
+#ifdef DEBUG
+#define IOP_PARANOIA 1
+#else
+#define IOP_PARANOIA 0
+#endif
+#define iop_paranoia(x) BUG_ON(IOP_PARANOIA && (x))
 
 /**
  * struct iop_adma_device - internal representation of an ADMA device
diff --git a/arch/arm/mach-iop13xx/include/mach/adma.h b/arch/arm/mach-iop13xx/include/mach/adma.h
index 60019c8e6465..5722e86f2174 100644
--- a/arch/arm/mach-iop13xx/include/mach/adma.h
+++ b/arch/arm/mach-iop13xx/include/mach/adma.h
@@ -404,7 +404,8 @@ static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
                                         u32 next_desc_addr)
 {
         struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
-        BUG_ON(hw_desc->next_desc);
+
+        iop_paranoia(hw_desc->next_desc);
         hw_desc->next_desc = next_desc_addr;
 }
 
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 95f5a9466816..c7a9306d951d 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -431,7 +431,7 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
         BUG_ON(iop_desc_get_next_desc(old_chain_tail) != next_dma); /* flush */
 
         /* check for pre-chained descriptors */
-        BUG_ON(iop_desc_get_next_desc(sw_desc));
+        iop_paranoia(iop_desc_get_next_desc(sw_desc));
 
         /* increment the pending count by the number of slots
          * memcpy operations have a 1:1 (slot:operation) relation