[PATCH v3 2/2] DMAEngine: Add DMAEngine driver based on old MSM DMA APIs
From: lars@metafoo.de (Lars-Peter Clausen)
Date: 2012-03-14 16:24:51
Also in:
linux-arm-msm, lkml
[...]
+
+struct dma_async_tx_descriptor *msm_dma_prep_interleaved(struct dma_chan *dchan,
+ struct dma_interleaved_template *xt,
+ unsigned long flags, void *context)
+{
+
+ struct msm_dma_chan *chan;
+ struct msm_dma_desc_sw *new;
+ struct adm_box_cmd_t *box_cmd_vaddr;
+ u32 *cmd_cntrl = context;
+
+ if (!dchan)
+ return ERR_PTR(-EINVAL);This is supposed to return either NULL or a valid descriptor.
+ + if (!xt) + return ERR_PTR(-EINVAL); [...