X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fdma%2Fiop-adma.c;h=c7a9306d951d2c61f622c601ef2d49af422b679e;hb=8f55c1e51fbb03998708bdd97d5b6665ab92462d;hp=71fba82462cb98372568a2f2da6c8c325e1a10d8;hpb=b73b636e8987f8728c6c700377615757691b9a55;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 71fba82462c..c7a9306d951 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -411,6 +411,7 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
 	int slot_cnt;
 	int slots_per_op;
 	dma_cookie_t cookie;
+	dma_addr_t next_dma;
 
 	grp_start = sw_desc->group_head;
 	slot_cnt = grp_start->slot_cnt;
@@ -425,12 +426,12 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
 			 &old_chain_tail->chain_node);
 
 	/* fix up the hardware chain */
-	iop_desc_set_next_desc(old_chain_tail, grp_start->async_tx.phys);
+	next_dma = grp_start->async_tx.phys;
+	iop_desc_set_next_desc(old_chain_tail, next_dma);
+	BUG_ON(iop_desc_get_next_desc(old_chain_tail) != next_dma); /* flush */
 
-	/* 1/ don't add pre-chained descriptors
-	 * 2/ dummy read to flush next_desc write
-	 */
-	BUG_ON(iop_desc_get_next_desc(sw_desc));
+	/* check for pre-chained descriptors */
+	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