DMAENGINE: extend the control command to include an arg

This adds an argument to the DMAengine control function, so that
we can later provide control commands that need some external data
passed in through an argument akin to the ioctl() operation
prototype.

[dan.j.williams@intel.com: fix up some missed conversions]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 246a6143e4a7..cb26ee9773d6 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -1472,7 +1472,8 @@ static void idmac_issue_pending(struct dma_chan *chan)
          */
 }
 
-static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                           unsigned long arg)
 {
         struct idmac_channel *ichan = to_idmac_chan(chan);
         struct idmac *idmac = to_idmac(chan->device);
@@ -1513,14 +1514,15 @@ static int __idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
         return 0;
 }
 
-static int idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd)
+static int idmac_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+                         unsigned long arg)
 {
         struct idmac_channel *ichan = to_idmac_chan(chan);
         int ret;
 
         mutex_lock(&ichan->chan_mutex);
 
-        ret = __idmac_control(chan, cmd);
+        ret = __idmac_control(chan, cmd, arg);
 
         mutex_unlock(&ichan->chan_mutex);
 
@@ -1616,7 +1618,7 @@ static void idmac_free_chan_resources(struct dma_chan *chan)
 
         mutex_lock(&ichan->chan_mutex);
 
-        __idmac_control(chan, DMA_TERMINATE_ALL);
+        __idmac_control(chan, DMA_TERMINATE_ALL, 0);
 
         if (ichan->status > IPU_CHANNEL_FREE) {
 #ifdef DEBUG
@@ -1709,7 +1711,7 @@ static void __exit ipu_idmac_exit(struct ipu *ipu)
         for (i = 0; i < IPU_CHANNELS_NUM; i++) {
                 struct idmac_channel *ichan = ipu->channel + i;
 
-                idmac_control(&ichan->dma_chan, DMA_TERMINATE_ALL);
+                idmac_control(&ichan->dma_chan, DMA_TERMINATE_ALL, 0);
                 idmac_prep_slave_sg(&ichan->dma_chan, NULL, 0, DMA_NONE, 0);
         }