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path: root/drivers/dma/pxa_dma.c
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Diffstat (limited to 'drivers/dma/pxa_dma.c')
-rw-r--r--drivers/dma/pxa_dma.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/dma/pxa_dma.c b/drivers/dma/pxa_dma.c
index 77c1c44009d8..e756a30ccba2 100644
--- a/drivers/dma/pxa_dma.c
+++ b/drivers/dma/pxa_dma.c
@@ -117,6 +117,7 @@ struct pxad_chan {
/* protected by vc->lock */
struct pxad_phy *phy;
struct dma_pool *desc_pool; /* Descriptors pool */
+ dma_cookie_t bus_error;
};
struct pxad_device {
@@ -563,6 +564,7 @@ static void pxad_launch_chan(struct pxad_chan *chan,
return;
}
}
+ chan->bus_error = 0;
/*
* Program the descriptor's address into the DMA controller,
@@ -666,6 +668,7 @@ static irqreturn_t pxad_chan_handler(int irq, void *dev_id)
struct virt_dma_desc *vd, *tmp;
unsigned int dcsr;
unsigned long flags;
+ dma_cookie_t last_started = 0;
BUG_ON(!chan);
@@ -678,6 +681,7 @@ static irqreturn_t pxad_chan_handler(int irq, void *dev_id)
dev_dbg(&chan->vc.chan.dev->device,
"%s(): checking txd %p[%x]: completed=%d\n",
__func__, vd, vd->tx.cookie, is_desc_completed(vd));
+ last_started = vd->tx.cookie;
if (to_pxad_sw_desc(vd)->cyclic) {
vchan_cyclic_callback(vd);
break;
@@ -690,7 +694,12 @@ static irqreturn_t pxad_chan_handler(int irq, void *dev_id)
}
}
- if (dcsr & PXA_DCSR_STOPSTATE) {
+ if (dcsr & PXA_DCSR_BUSERR) {
+ chan->bus_error = last_started;
+ phy_disable(phy);
+ }
+
+ if (!chan->bus_error && dcsr & PXA_DCSR_STOPSTATE) {
dev_dbg(&chan->vc.chan.dev->device,
"%s(): channel stopped, submitted_empty=%d issued_empty=%d",
__func__,
@@ -1249,6 +1258,9 @@ static enum dma_status pxad_tx_status(struct dma_chan *dchan,
struct pxad_chan *chan = to_pxad_chan(dchan);
enum dma_status ret;
+ if (cookie == chan->bus_error)
+ return DMA_ERROR;
+
ret = dma_cookie_status(dchan, cookie, txstate);
if (likely(txstate && (ret != DMA_ERROR)))
dma_set_residue(txstate, pxad_residue(chan, cookie));
@@ -1321,7 +1333,7 @@ static int pxad_init_phys(struct platform_device *op,
return 0;
}
-static const struct of_device_id const pxad_dt_ids[] = {
+static const struct of_device_id pxad_dt_ids[] = {
{ .compatible = "marvell,pdma-1.0", },
{}
};