iop-adma: implement a private tx_list

    
Drop iop-adma's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.

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

2 files changed, 7 insertions, 4 deletions

diff --git a/arch/arm/include/asm/hardware/iop_adma.h b/arch/arm/include/asm/hardware/iop_adma.h
index 385c6e8cbbd2..95dc133d0a7f 100644
--- a/arch/arm/include/asm/hardware/iop_adma.h
+++ b/arch/arm/include/asm/hardware/iop_adma.h
@@ -86,6 +86,7 @@ struct iop_adma_chan {
  * @idx: pool index
  * @unmap_src_cnt: number of xor sources
  * @unmap_len: transaction bytecount
+ * @tx_list: list of descriptors that are associated with one operation
  * @async_tx: support for the async_tx api
  * @group_list: list of slots that make up a multi-descriptor transaction
  *      for example transfer lengths larger than the supported hw max
@@ -102,6 +103,7 @@ struct iop_adma_desc_slot {
         u16 idx;
         u16 unmap_src_cnt;
         size_t unmap_len;
+        struct list_head tx_list;
         struct dma_async_tx_descriptor async_tx;
         union {
                 u32 *xor_check_result;
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 2f052265122f..9f6c16f8e2be 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -370,7 +370,7 @@ retry:
                         }
                         alloc_tail->group_head = alloc_start;
                         alloc_tail->async_tx.cookie = -EBUSY;
-                        list_splice(&chain, &alloc_tail->async_tx.tx_list);
+                        list_splice(&chain, &alloc_tail->tx_list);
                         iop_chan->last_used = last_used;
                         iop_desc_clear_next_desc(alloc_start);
                         iop_desc_clear_next_desc(alloc_tail);
@@ -429,7 +429,7 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
 
         old_chain_tail = list_entry(iop_chan->chain.prev,
                 struct iop_adma_desc_slot, chain_node);
-        list_splice_init(&sw_desc->async_tx.tx_list,
+        list_splice_init(&sw_desc->tx_list,
                          &old_chain_tail->chain_node);
 
         /* fix up the hardware chain */
@@ -496,6 +496,7 @@ static int iop_adma_alloc_chan_resources(struct dma_chan *chan)
 
                 dma_async_tx_descriptor_init(&slot->async_tx, chan);
                 slot->async_tx.tx_submit = iop_adma_tx_submit;
+                INIT_LIST_HEAD(&slot->tx_list);
                 INIT_LIST_HEAD(&slot->chain_node);
                 INIT_LIST_HEAD(&slot->slot_node);
                 hw_desc = (char *) iop_chan->device->dma_desc_pool;
@@ -1296,7 +1297,7 @@ static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan)
         if (sw_desc) {
                 grp_start = sw_desc->group_head;
 
-                list_splice_init(&sw_desc->async_tx.tx_list, &iop_chan->chain);
+                list_splice_init(&sw_desc->tx_list, &iop_chan->chain);
                 async_tx_ack(&sw_desc->async_tx);
                 iop_desc_init_memcpy(grp_start, 0);
                 iop_desc_set_byte_count(grp_start, iop_chan, 0);
@@ -1352,7 +1353,7 @@ static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan)
         sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
         if (sw_desc) {
                 grp_start = sw_desc->group_head;
-                list_splice_init(&sw_desc->async_tx.tx_list, &iop_chan->chain);
+                list_splice_init(&sw_desc->tx_list, &iop_chan->chain);
                 async_tx_ack(&sw_desc->async_tx);
                 iop_desc_init_null_xor(grp_start, 2, 0);
                 iop_desc_set_byte_count(grp_start, iop_chan, 0);