parport_ip32: pass struct device to DMA API functions

The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons.  Pass the easily
available struct device from the platform_device to remedy this.

Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 10 insertions, 8 deletions

diff --git a/drivers/parport/parport_ip32.c b/drivers/parport/parport_ip32.c
index 62873070f988..b7a892791c3e 100644
--- a/drivers/parport/parport_ip32.c
+++ b/drivers/parport/parport_ip32.c
@@ -568,6 +568,7 @@ static irqreturn_t parport_ip32_merr_interrupt(int irq, void *dev_id)
 
 /**
  * parport_ip32_dma_start - begins a DMA transfer
+ * @p:          partport to work on
  * @dir:        DMA direction: DMA_TO_DEVICE or DMA_FROM_DEVICE
  * @addr:       pointer to data buffer
  * @count:      buffer size
@@ -575,8 +576,8 @@ static irqreturn_t parport_ip32_merr_interrupt(int irq, void *dev_id)
  * Calls to parport_ip32_dma_start() and parport_ip32_dma_stop() must be
  * correctly balanced.
  */
-static int parport_ip32_dma_start(enum dma_data_direction dir,
-                                  void *addr, size_t count)
+static int parport_ip32_dma_start(struct parport *p,
+                enum dma_data_direction dir, void *addr, size_t count)
 {
         unsigned int limit;
         u64 ctrl;
@@ -601,7 +602,7 @@ static int parport_ip32_dma_start(enum dma_data_direction dir,
 
         /* Prepare DMA pointers */
         parport_ip32_dma.dir = dir;
-        parport_ip32_dma.buf = dma_map_single(NULL, addr, count, dir);
+        parport_ip32_dma.buf = dma_map_single(&p->bus_dev, addr, count, dir);
         parport_ip32_dma.len = count;
         parport_ip32_dma.next = parport_ip32_dma.buf;
         parport_ip32_dma.left = parport_ip32_dma.len;
@@ -625,11 +626,12 @@ static int parport_ip32_dma_start(enum dma_data_direction dir,
 
 /**
  * parport_ip32_dma_stop - ends a running DMA transfer
+ * @p:          partport to work on
  *
  * Calls to parport_ip32_dma_start() and parport_ip32_dma_stop() must be
  * correctly balanced.
  */
-static void parport_ip32_dma_stop(void)
+static void parport_ip32_dma_stop(struct parport *p)
 {
         u64 ctx_a;
         u64 ctx_b;
@@ -685,8 +687,8 @@ static void parport_ip32_dma_stop(void)
         enable_irq(MACEISA_PAR_CTXB_IRQ);
         parport_ip32_dma.irq_on = 1;
 
-        dma_unmap_single(NULL, parport_ip32_dma.buf, parport_ip32_dma.len,
-                         parport_ip32_dma.dir);
+        dma_unmap_single(&p->bus_dev, parport_ip32_dma.buf,
+                         parport_ip32_dma.len, parport_ip32_dma.dir);
 }
 
 /**
@@ -1445,7 +1447,7 @@ static size_t parport_ip32_fifo_write_block_dma(struct parport *p,
 
         priv->irq_mode = PARPORT_IP32_IRQ_HERE;
 
-        parport_ip32_dma_start(DMA_TO_DEVICE, (void *)buf, len);
+        parport_ip32_dma_start(p, DMA_TO_DEVICE, (void *)buf, len);
         reinit_completion(&priv->irq_complete);
         parport_ip32_frob_econtrol(p, ECR_DMAEN | ECR_SERVINTR, ECR_DMAEN);
 
@@ -1461,7 +1463,7 @@ static size_t parport_ip32_fifo_write_block_dma(struct parport *p,
                 if (ecr & ECR_SERVINTR)
                         break;  /* DMA transfer just finished */
         }
-        parport_ip32_dma_stop();
+        parport_ip32_dma_stop(p);
         written = len - parport_ip32_dma_get_residue();
 
         priv->irq_mode = PARPORT_IP32_IRQ_FWD;