diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dw_dmac.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index c0c9370ddd3f..dd7a8192d5a0 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -1087,6 +1087,7 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) struct dw_desc *desc; int i; unsigned long flags; + int ret; dev_vdbg(chan2dev(chan), "%s\n", __func__); @@ -1110,12 +1111,8 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) spin_unlock_irqrestore(&dwc->lock, flags); desc = kzalloc(sizeof(struct dw_desc), GFP_KERNEL); - if (!desc) { - dev_info(chan2dev(chan), - "only allocated %d descriptors\n", i); - spin_lock_irqsave(&dwc->lock, flags); - break; - } + if (!desc) + goto err_desc_alloc; INIT_LIST_HEAD(&desc->tx_list); dma_async_tx_descriptor_init(&desc->txd, chan); @@ -1123,6 +1120,10 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) desc->txd.flags = DMA_CTRL_ACK; desc->txd.phys = dma_map_single(chan2parent(chan), &desc->lli, sizeof(desc->lli), DMA_TO_DEVICE); + ret = dma_mapping_error(chan2parent(chan), desc->txd.phys); + if (ret) + goto err_desc_alloc; + dwc_desc_put(dwc, desc); spin_lock_irqsave(&dwc->lock, flags); @@ -1134,6 +1135,13 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) dev_dbg(chan2dev(chan), "%s: allocated %d descriptors\n", __func__, i); return i; + +err_desc_alloc: + kfree(desc); + + dev_info(chan2dev(chan), "only allocated %d descriptors\n", i); + + return i; } static void dwc_free_chan_resources(struct dma_chan *chan) |