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>

diff --git a/arch/arm/include/asm/hardware/iop3xx-adma.h b/arch/arm/include/asm/hardware/iop3xx-adma.h
index 87bff09..83e6ba3 100644 (file)
--- 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 cb7e361..385c6e8 100644 (file)
--- 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 60019c8..5722e86 100644 (file)
--- 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 95f5a94..c7a9306 100644 (file)
--- 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