1 files changed, 17 insertions, 3 deletions

diff --git a/drivers/dma/apple-admac.c b/drivers/dma/apple-admac.c
index 90f28bda29c8..4cf8da77bdd9 100644
--- a/drivers/dma/apple-admac.c
+++ b/drivers/dma/apple-admac.c
@@ -75,6 +75,7 @@
 
 #define REG_TX_INTSTATE(idx)		(0x0030 + (idx) * 4)
 #define REG_RX_INTSTATE(idx)		(0x0040 + (idx) * 4)
+#define REG_GLOBAL_INTSTATE(idx)	(0x0050 + (idx) * 4)
 #define REG_CHAN_INTSTATUS(ch, idx)	(0x8010 + (ch) * 0x200 + (idx) * 4)
 #define REG_CHAN_INTMASK(ch, idx)	(0x8020 + (ch) * 0x200 + (idx) * 4)
 
@@ -511,7 +512,10 @@ static int admac_terminate_all(struct dma_chan *chan)
 	admac_stop_chan(adchan);
 	admac_reset_rings(adchan);
 
-	adchan->current_tx = NULL;
+	if (adchan->current_tx) {
+		list_add_tail(&adchan->current_tx->node, &adchan->to_free);
+		adchan->current_tx = NULL;
+	}
 	/*
 	 * Descriptors can only be freed after the tasklet
 	 * has been killed (in admac_synchronize).
@@ -672,13 +676,14 @@ static void admac_handle_chan_int(struct admac_data *ad, int no)
 static irqreturn_t admac_interrupt(int irq, void *devid)
 {
 	struct admac_data *ad = devid;
-	u32 rx_intstate, tx_intstate;
+	u32 rx_intstate, tx_intstate, global_intstate;
 	int i;
 
 	rx_intstate = readl_relaxed(ad->base + REG_RX_INTSTATE(ad->irq_index));
 	tx_intstate = readl_relaxed(ad->base + REG_TX_INTSTATE(ad->irq_index));
+	global_intstate = readl_relaxed(ad->base + REG_GLOBAL_INTSTATE(ad->irq_index));
 
-	if (!tx_intstate && !rx_intstate)
+	if (!tx_intstate && !rx_intstate && !global_intstate)
 		return IRQ_NONE;
 
 	for (i = 0; i < ad->nchannels; i += 2) {
@@ -693,6 +698,12 @@ static irqreturn_t admac_interrupt(int irq, void *devid)
 		rx_intstate >>= 1;
 	}
 
+	if (global_intstate) {
+		dev_warn(ad->dev, "clearing unknown global interrupt flag: %x\n",
+			 global_intstate);
+		writel_relaxed(~(u32) 0, ad->base + REG_GLOBAL_INTSTATE(ad->irq_index));
+	}
+
 	return IRQ_HANDLED;
 }
 
@@ -850,6 +861,9 @@ static int admac_probe(struct platform_device *pdev)
 
 	dma->directions = BIT(DMA_MEM_TO_DEV) | BIT(DMA_DEV_TO_MEM);
 	dma->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+	dma->src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+			BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+			BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
 	dma->dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
 			BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
 			BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);