19 files changed, 49 insertions, 30 deletions

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 1b53f260525..c301a8ec31a 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1313,7 +1313,7 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
 static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
                 struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags)
+                unsigned long flags, void *context)
 {
         struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
         struct pl08x_driver_data *pl08x = plchan->host;
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 5d225ddc769..f24b16e455f 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -639,11 +639,12 @@ err_desc_get:
  * @sg_len: number of entries in @scatterlist
  * @direction: DMA direction
  * @flags: tx descriptor status flags
+ * @context: transaction context (ignored)
  */
 static struct dma_async_tx_descriptor *
 atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags)
+                unsigned long flags, void *context)
 {
         struct at_dma_chan      *atchan = to_at_dma_chan(chan);
         struct at_dma_slave     *atslave = chan->private;
@@ -840,10 +841,12 @@ atc_dma_cyclic_fill_desc(struct at_dma_slave *atslave, struct at_desc *desc,
  * @buf_len: total number of bytes for the entire buffer
  * @period_len: number of bytes for each period
  * @direction: transfer direction, to or from device
+ * @context: transfer context (ignored)
  */
 static struct dma_async_tx_descriptor *
 atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
-                size_t period_len, enum dma_transfer_direction direction)
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context)
 {
         struct at_dma_chan      *atchan = to_at_dma_chan(chan);
         struct at_dma_slave     *atslave = chan->private;
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 187bb9eef4a..dc89455f555 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1021,7 +1021,7 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
 static struct dma_async_tx_descriptor *
 coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
                         unsigned int sg_len, enum dma_transfer_direction direction,
-                        unsigned long flags)
+                        unsigned long flags, void *context)
 {
         struct coh901318_chan *cohc = to_coh901318_chan(chan);
         struct coh901318_lli *lli;
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index cb173bbdcfd..7439079f5ee 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -704,7 +704,7 @@ err_desc_get:
 static struct dma_async_tx_descriptor *
 dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags)
+                unsigned long flags, void *context)
 {
         struct dw_dma_chan      *dwc = to_dw_dma_chan(chan);
         struct dw_dma_slave     *dws = chan->private;
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index f25e83bf567..e6f133b78dc 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -975,13 +975,14 @@ fail:
  * @sg_len: number of entries in @sgl
  * @dir: direction of tha DMA transfer
  * @flags: flags for the descriptor
+ * @context: operation context (ignored)
  *
  * Returns a valid DMA descriptor or %NULL in case of failure.
  */
 static struct dma_async_tx_descriptor *
 ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
                          unsigned int sg_len, enum dma_transfer_direction dir,
-                         unsigned long flags)
+                         unsigned long flags, void *context)
 {
         struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
         struct ep93xx_dma_desc *desc, *first;
@@ -1048,6 +1049,7 @@ fail:
  * @buf_len: length of the buffer (in bytes)
  * @period_len: lenght of a single period
  * @dir: direction of the operation
+ * @context: operation context (ignored)
  *
  * Prepares a descriptor for cyclic DMA operation. This means that once the
  * descriptor is submitted, we will be submitting in a @period_len sized
@@ -1060,7 +1062,7 @@ fail:
 static struct dma_async_tx_descriptor *
 ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
                            size_t buf_len, size_t period_len,
-                           enum dma_transfer_direction dir)
+                           enum dma_transfer_direction dir, void *context)
 {
         struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
         struct ep93xx_dma_desc *desc, *first;
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 7d7384b3462..8f84761f98b 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -759,6 +759,7 @@ fail:
  * @sg_len: number of entries in @scatterlist
  * @direction: DMA direction
  * @flags: DMAEngine flags
+ * @context: transaction context (ignored)
  *
  * Prepare a set of descriptors for a DMA_SLAVE transaction. Following the
  * DMA_SLAVE API, this gets the device-specific information from the
@@ -766,7 +767,8 @@ fail:
  */
 static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
         struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len,
-        enum dma_transfer_direction direction, unsigned long flags)
+        enum dma_transfer_direction direction, unsigned long flags,
+        void *context)
 {
         /*
          * This operation is not supported on the Freescale DMA controller
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 20c1565a748..304839a99ae 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -354,7 +354,7 @@ static void imxdma_free_chan_resources(struct dma_chan *chan)
 static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
                 struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags)
+                unsigned long flags, void *context)
 {
         struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
         struct scatterlist *sg;
@@ -405,7 +405,8 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
 
 static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
                 struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
-                size_t period_len, enum dma_transfer_direction direction)
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context)
 {
         struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
         struct imxdma_engine *imxdma = imxdmac->imxdma;
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index f8259ee49f8..434fb610aa1 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -903,7 +903,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
 static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
                 struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags)
+                unsigned long flags, void *context)
 {
         struct sdma_channel *sdmac = to_sdma_chan(chan);
         struct sdma_engine *sdma = sdmac->sdma;
@@ -1001,7 +1001,8 @@ err_out:
 
 static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
                 struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
-                size_t period_len, enum dma_transfer_direction direction)
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context)
 {
         struct sdma_channel *sdmac = to_sdma_chan(chan);
         struct sdma_engine *sdma = sdmac->sdma;
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index 2449812f546..c900ca7aaec 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -714,13 +714,14 @@ err_desc_get:
  * @sg_len: length of sg txn
  * @direction: DMA transfer dirtn
  * @flags: DMA flags
+ * @context: transfer context (ignored)
  *
  * Prepares LLI based periphral transfer
  */
 static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg(
                         struct dma_chan *chan, struct scatterlist *sgl,
                         unsigned int sg_len, enum dma_transfer_direction direction,
-                        unsigned long flags)
+                        unsigned long flags, void *context)
 {
         struct intel_mid_dma_chan *midc = NULL;
         struct intel_mid_dma_slave *mids = NULL;
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 1880274b085..62e3f8ec246 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -1335,7 +1335,8 @@ static void ipu_gc_tasklet(unsigned long arg)
 /* Allocate and initialise a transfer descriptor. */
 static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
                 struct scatterlist *sgl, unsigned int sg_len,
-                enum dma_transfer_direction direction, unsigned long tx_flags)
+                enum dma_transfer_direction direction, unsigned long tx_flags,
+                void *context)
 {
         struct idmac_channel *ichan = to_idmac_chan(chan);
         struct idmac_tx_desc *desc = NULL;
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index a2267f9ab56..65334c49b71 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -340,7 +340,7 @@ static void mxs_dma_free_chan_resources(struct dma_chan *chan)
 static struct dma_async_tx_descriptor *mxs_dma_prep_slave_sg(
                 struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long append)
+                unsigned long append, void *context)
 {
         struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
         struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
@@ -435,7 +435,8 @@ err_out:
 
 static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
                 struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
-                size_t period_len, enum dma_transfer_direction direction)
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context)
 {
         struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
         struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index c93bb045997..65c0495a6d4 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -587,7 +587,8 @@ static void pd_issue_pending(struct dma_chan *chan)
 
 static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
                         struct scatterlist *sgl, unsigned int sg_len,
-                        enum dma_transfer_direction direction, unsigned long flags)
+                        enum dma_transfer_direction direction, unsigned long flags,
+                        void *context)
 {
         struct pch_dma_chan *pd_chan = to_pd_chan(chan);
         struct pch_dma_slave *pd_slave = chan->private;
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index e863d7fc465..87d752a77f5 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2685,7 +2685,8 @@ static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len)
 
 static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
                 struct dma_chan *chan, dma_addr_t dma_addr, size_t len,
-                size_t period_len, enum dma_transfer_direction direction)
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context)
 {
         struct dma_pl330_desc *desc;
         struct dma_pl330_chan *pch = to_pchan(chan);
@@ -2775,7 +2776,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
 static struct dma_async_tx_descriptor *
 pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flg)
+                unsigned long flg, void *context)
 {
         struct dma_pl330_desc *first, *desc = NULL;
         struct dma_pl330_chan *pch = to_pchan(chan);
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 5c4088603dd..19d7a8d3975 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -669,7 +669,8 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
 
 static struct dma_async_tx_descriptor *sh_dmae_prep_slave_sg(
         struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len,
-        enum dma_transfer_direction direction, unsigned long flags)
+        enum dma_transfer_direction direction, unsigned long flags,
+        void *context)
 {
         struct sh_dmae_slave *param;
         struct sh_dmae_chan *sh_chan;
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
index 45ba352fb87..434ad31174f 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -489,7 +489,7 @@ err_dir:
 static struct dma_async_tx_descriptor *
 sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
         size_t buf_len, size_t period_len,
-        enum dma_transfer_direction direction)
+        enum dma_transfer_direction direction, void *context)
 {
         struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
         struct sirfsoc_dma_desc *sdesc = NULL;
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 1ea6d02d08a..bdd41d4bfa8 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2289,7 +2289,8 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
                                                          struct scatterlist *sgl,
                                                          unsigned int sg_len,
                                                          enum dma_transfer_direction direction,
-                                                         unsigned long dma_flags)
+                                                         unsigned long dma_flags,
+                                                         void *context)
 {
         if (direction != DMA_DEV_TO_MEM && direction != DMA_MEM_TO_DEV)
                 return NULL;
@@ -2300,7 +2301,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
 static struct dma_async_tx_descriptor *
 dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
                      size_t buf_len, size_t period_len,
-                     enum dma_transfer_direction direction)
+                     enum dma_transfer_direction direction, void *context)
 {
         unsigned int periods = buf_len / period_len;
         struct dma_async_tx_descriptor *txd;
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index d408c220602..4e0dff59901 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -542,7 +542,8 @@ static void td_issue_pending(struct dma_chan *chan)
 
 static struct dma_async_tx_descriptor *td_prep_slave_sg(struct dma_chan *chan,
         struct scatterlist *sgl, unsigned int sg_len,
-        enum dma_transfer_direction direction, unsigned long flags)
+        enum dma_transfer_direction direction, unsigned long flags,
+        void *context)
 {
         struct timb_dma_chan *td_chan =
                 container_of(chan, struct timb_dma_chan, chan);
diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index 40440f94638..913f55c76c9 100644
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -833,7 +833,7 @@ txx9dmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
 static struct dma_async_tx_descriptor *
 txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags)
+                unsigned long flags, void *context)
 {
         struct txx9dmac_chan *dc = to_txx9dmac_chan(chan);
         struct txx9dmac_dev *ddev = dc->ddev;
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 03d68b7e570..b3b5b38776f 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -582,10 +582,11 @@ struct dma_device {
         struct dma_async_tx_descriptor *(*device_prep_slave_sg)(
                 struct dma_chan *chan, struct scatterlist *sgl,
                 unsigned int sg_len, enum dma_transfer_direction direction,
-                unsigned long flags);
+                unsigned long flags, void *context);
         struct dma_async_tx_descriptor *(*device_prep_dma_cyclic)(
                 struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
-                size_t period_len, enum dma_transfer_direction direction);
+                size_t period_len, enum dma_transfer_direction direction,
+                void *context);
         struct dma_async_tx_descriptor *(*device_prep_interleaved_dma)(
                 struct dma_chan *chan, struct dma_interleaved_template *xt,
                 unsigned long flags);
@@ -619,7 +620,8 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
         struct scatterlist sg;
         sg_init_one(&sg, buf, len);
 
-        return chan->device->device_prep_slave_sg(chan, &sg, 1, dir, flags);
+        return chan->device->device_prep_slave_sg(chan, &sg, 1,
+                                                  dir, flags, NULL);
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg(
@@ -627,7 +629,7 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg(
         enum dma_transfer_direction dir, unsigned long flags)
 {
         return chan->device->device_prep_slave_sg(chan, sgl, sg_len,
-                                                  dir, flags);
+                                                  dir, flags, NULL);
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
@@ -635,7 +637,7 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
                 size_t period_len, enum dma_transfer_direction dir)
 {
         return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len,
-                                                        period_len, dir);
+                                                period_len, dir, NULL);
 }
 
 static inline int dmaengine_terminate_all(struct dma_chan *chan)