diff options
Diffstat (limited to 'drivers/dma/stm32-dma.c')
| -rw-r--r-- | drivers/dma/stm32-dma.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 9840594a6a..90857d08a1 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -21,7 +21,6 @@ #include <linux/list.h> #include <linux/module.h> #include <linux/of.h> -#include <linux/of_device.h> #include <linux/of_dma.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> @@ -191,7 +190,7 @@ struct stm32_dma_desc { struct virt_dma_desc vdesc; bool cyclic; u32 num_sgs; - struct stm32_dma_sg_req sg_req[]; + struct stm32_dma_sg_req sg_req[] __counted_by(num_sgs); }; /** @@ -1105,6 +1104,7 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_slave_sg( desc = kzalloc(struct_size(desc, sg_req, sg_len), GFP_NOWAIT); if (!desc) return NULL; + desc->num_sgs = sg_len; /* Set peripheral flow controller */ if (chan->dma_sconfig.device_fc) @@ -1143,8 +1143,6 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_slave_sg( desc->sg_req[i].chan_reg.dma_sm1ar += sg_dma_len(sg); desc->sg_req[i].chan_reg.dma_sndtr = nb_data_items; } - - desc->num_sgs = sg_len; desc->cyclic = false; return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); @@ -1218,6 +1216,7 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_dma_cyclic( desc = kzalloc(struct_size(desc, sg_req, num_periods), GFP_NOWAIT); if (!desc) return NULL; + desc->num_sgs = num_periods; for (i = 0; i < num_periods; i++) { desc->sg_req[i].len = period_len; @@ -1234,8 +1233,6 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_dma_cyclic( if (!chan->trig_mdma) buf_addr += period_len; } - - desc->num_sgs = num_periods; desc->cyclic = true; return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); @@ -1256,6 +1253,7 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_dma_memcpy( desc = kzalloc(struct_size(desc, sg_req, num_sgs), GFP_NOWAIT); if (!desc) return NULL; + desc->num_sgs = num_sgs; threshold = chan->threshold; @@ -1289,8 +1287,6 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_dma_memcpy( desc->sg_req[i].chan_reg.dma_sndtr = xfer_count; desc->sg_req[i].len = xfer_count; } - - desc->num_sgs = num_sgs; desc->cyclic = false; return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); @@ -1571,17 +1567,10 @@ static int stm32_dma_probe(struct platform_device *pdev) struct stm32_dma_chan *chan; struct stm32_dma_device *dmadev; struct dma_device *dd; - const struct of_device_id *match; struct resource *res; struct reset_control *rst; int i, ret; - match = of_match_device(stm32_dma_of_match, &pdev->dev); - if (!match) { - dev_err(&pdev->dev, "Error: No device match found\n"); - return -ENODEV; - } - dmadev = devm_kzalloc(&pdev->dev, sizeof(*dmadev), GFP_KERNEL); if (!dmadev) return -ENOMEM; |