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path: root/drivers/dma/at_xdmac.c
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Diffstat (limited to 'drivers/dma/at_xdmac.c')
-rw-r--r--drivers/dma/at_xdmac.c44
1 files changed, 18 insertions, 26 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index f71c9f77d405..bb0eaf38b594 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1543,9 +1543,6 @@ static void at_xdmac_remove_xfer(struct at_xdmac_chan *atchan,
static void at_xdmac_advance_work(struct at_xdmac_chan *atchan)
{
struct at_xdmac_desc *desc;
- unsigned long flags;
-
- spin_lock_irqsave(&atchan->lock, flags);
/*
* If channel is enabled, do nothing, advance_work will be triggered
@@ -1559,8 +1556,6 @@ static void at_xdmac_advance_work(struct at_xdmac_chan *atchan)
if (!desc->active_xfer)
at_xdmac_start_xfer(atchan, desc);
}
-
- spin_unlock_irqrestore(&atchan->lock, flags);
}
static void at_xdmac_handle_cyclic(struct at_xdmac_chan *atchan)
@@ -1596,7 +1591,7 @@ static void at_xdmac_handle_error(struct at_xdmac_chan *atchan)
if (atchan->irq_status & AT_XDMAC_CIS_ROIS)
dev_err(chan2dev(&atchan->chan), "request overflow error!!!");
- spin_lock_bh(&atchan->lock);
+ spin_lock_irq(&atchan->lock);
/* Channel must be disabled first as it's not done automatically */
at_xdmac_write(atxdmac, AT_XDMAC_GD, atchan->mask);
@@ -1607,7 +1602,7 @@ static void at_xdmac_handle_error(struct at_xdmac_chan *atchan)
struct at_xdmac_desc,
xfer_node);
- spin_unlock_bh(&atchan->lock);
+ spin_unlock_irq(&atchan->lock);
/* Print bad descriptor's details if needed */
dev_dbg(chan2dev(&atchan->chan),
@@ -1640,31 +1635,31 @@ static void at_xdmac_tasklet(unsigned long data)
if (atchan->irq_status & error_mask)
at_xdmac_handle_error(atchan);
- spin_lock(&atchan->lock);
+ spin_lock_irq(&atchan->lock);
desc = list_first_entry(&atchan->xfers_list,
struct at_xdmac_desc,
xfer_node);
dev_vdbg(chan2dev(&atchan->chan), "%s: desc 0x%p\n", __func__, desc);
if (!desc->active_xfer) {
dev_err(chan2dev(&atchan->chan), "Xfer not active: exiting");
- spin_unlock(&atchan->lock);
+ spin_unlock_irq(&atchan->lock);
return;
}
txd = &desc->tx_dma_desc;
at_xdmac_remove_xfer(atchan, desc);
- spin_unlock(&atchan->lock);
+ spin_unlock_irq(&atchan->lock);
- if (!at_xdmac_chan_is_cyclic(atchan)) {
- dma_cookie_complete(txd);
- if (txd->flags & DMA_PREP_INTERRUPT)
- dmaengine_desc_get_callback_invoke(txd, NULL);
- }
+ dma_cookie_complete(txd);
+ if (txd->flags & DMA_PREP_INTERRUPT)
+ dmaengine_desc_get_callback_invoke(txd, NULL);
dma_run_dependencies(txd);
+ spin_lock_irq(&atchan->lock);
at_xdmac_advance_work(atchan);
+ spin_unlock_irq(&atchan->lock);
}
}
@@ -1725,11 +1720,15 @@ static irqreturn_t at_xdmac_interrupt(int irq, void *dev_id)
static void at_xdmac_issue_pending(struct dma_chan *chan)
{
struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
+ unsigned long flags;
dev_dbg(chan2dev(&atchan->chan), "%s\n", __func__);
- if (!at_xdmac_chan_is_cyclic(atchan))
+ if (!at_xdmac_chan_is_cyclic(atchan)) {
+ spin_lock_irqsave(&atchan->lock, flags);
at_xdmac_advance_work(atchan);
+ spin_unlock_irqrestore(&atchan->lock, flags);
+ }
return;
}
@@ -1822,26 +1821,21 @@ static int at_xdmac_alloc_chan_resources(struct dma_chan *chan)
struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
struct at_xdmac_desc *desc;
int i;
- unsigned long flags;
-
- spin_lock_irqsave(&atchan->lock, flags);
if (at_xdmac_chan_is_enabled(atchan)) {
dev_err(chan2dev(chan),
"can't allocate channel resources (channel enabled)\n");
- i = -EIO;
- goto spin_unlock;
+ return -EIO;
}
if (!list_empty(&atchan->free_descs_list)) {
dev_err(chan2dev(chan),
"can't allocate channel resources (channel not free from a previous use)\n");
- i = -EIO;
- goto spin_unlock;
+ return -EIO;
}
for (i = 0; i < init_nr_desc_per_channel; i++) {
- desc = at_xdmac_alloc_desc(chan, GFP_ATOMIC);
+ desc = at_xdmac_alloc_desc(chan, GFP_KERNEL);
if (!desc) {
dev_warn(chan2dev(chan),
"only %d descriptors have been allocated\n", i);
@@ -1854,8 +1848,6 @@ static int at_xdmac_alloc_chan_resources(struct dma_chan *chan)
dev_dbg(chan2dev(chan), "%s: allocated %d descriptors\n", __func__, i);
-spin_unlock:
- spin_unlock_irqrestore(&atchan->lock, flags);
return i;
}