X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fdma%2Ffsldma.c;h=7313a1ae5f833e44c8f559cb35475b27f18c338b;hb=bcfb7465c03a8c62c89da374677df56f6b894d44;hp=da8a8ed9e411008d68e14820444695176caa9318;hpb=1e2ae4ddd373af6fa3ea2483d7fc4a08c7f54395;p=karo-tx-linux.git

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index da8a8ed9e411..7313a1ae5f83 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -313,8 +313,8 @@ static void fsl_chan_toggle_ext_start(struct fsl_dma_chan *fsl_chan, int enable)
 
 static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
 {
-	struct fsl_desc_sw *desc = tx_to_fsl_desc(tx);
 	struct fsl_dma_chan *fsl_chan = to_fsl_chan(tx->chan);
+	struct fsl_desc_sw *desc;
 	unsigned long flags;
 	dma_cookie_t cookie;
 
@@ -322,14 +322,17 @@ static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
 	spin_lock_irqsave(&fsl_chan->desc_lock, flags);
 
 	cookie = fsl_chan->common.cookie;
-	cookie++;
-	if (cookie < 0)
-		cookie = 1;
-	desc->async_tx.cookie = cookie;
-	fsl_chan->common.cookie = desc->async_tx.cookie;
+	list_for_each_entry(desc, &tx->tx_list, node) {
+		cookie++;
+		if (cookie < 0)
+			cookie = 1;
 
-	append_ld_queue(fsl_chan, desc);
-	list_splice_init(&desc->async_tx.tx_list, fsl_chan->ld_queue.prev);
+		desc->async_tx.cookie = cookie;
+	}
+
+	fsl_chan->common.cookie = cookie;
+	append_ld_queue(fsl_chan, tx_to_fsl_desc(tx));
+	list_splice_init(&tx->tx_list, fsl_chan->ld_queue.prev);
 
 	spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
 
@@ -598,15 +601,16 @@ static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan)
 	dma_addr_t next_dest_addr;
 	unsigned long flags;
 
+	spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+
 	if (!dma_is_idle(fsl_chan))
-		return;
+		goto out_unlock;
 
 	dma_halt(fsl_chan);
 
 	/* If there are some link descriptors
 	 * not transfered in queue. We need to start it.
 	 */
-	spin_lock_irqsave(&fsl_chan->desc_lock, flags);
 
 	/* Find the first un-transfer desciptor */
 	for (ld_node = fsl_chan->ld_queue.next;
@@ -617,8 +621,6 @@ static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan)
 				fsl_chan->common.cookie) == DMA_SUCCESS);
 		ld_node = ld_node->next);
 
-	spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
-
 	if (ld_node != &fsl_chan->ld_queue) {
 		/* Get the ld start address from ld_queue */
 		next_dest_addr = to_fsl_desc(ld_node)->async_tx.phys;
@@ -630,6 +632,9 @@ static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan)
 		set_cdar(fsl_chan, 0);
 		set_ndar(fsl_chan, 0);
 	}
+
+out_unlock:
+	spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
 }
 
 /**
@@ -830,7 +835,7 @@ static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev,
 			new_fsl_chan->reg.end - new_fsl_chan->reg.start + 1);
 
 	new_fsl_chan->id = ((new_fsl_chan->reg.start - 0x100) & 0xfff) >> 7;
-	if (new_fsl_chan->id > FSL_DMA_MAX_CHANS_PER_DEVICE) {
+	if (new_fsl_chan->id >= FSL_DMA_MAX_CHANS_PER_DEVICE) {
 		dev_err(fdev->dev, "There is no %d channel!\n",
 				new_fsl_chan->id);
 		err = -EINVAL;