[v3,1/2] dmaengine: ti-dma-crossbar: Make idr xbar instance-specific

Commit Message

Peter Ujfalusi July 22, 2015, 8:48 a.m. UTC

From: Misael Lopez Cruz <[e-mail]>

In preparation for supporting multiple DMA crossbar instances,
make the idr xbar instance specific.

Signed-off-by: Misael Lopez Cruz <[e-mail]>
Signed-off-by: Peter Ujfalusi <[e-mail]>
---
 drivers/dma/ti-dma-crossbar.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/dma/ti-dma-crossbar.c b/drivers/dma/ti-dma-crossbar.c
index 24f5ca2356bf..1fd3fb73d6e8 100644
--- a/drivers/dma/ti-dma-crossbar.c
+++ b/drivers/dma/ti-dma-crossbar.c
@@ -20,12 +20,11 @@ 
 #define TI_XBAR_OUTPUTS	127
 #define TI_XBAR_INPUTS	256
 
-static DEFINE_IDR(map_idr);
-
 struct ti_dma_xbar_data {
 	void __iomem *iomem;
 
 	struct dma_router dmarouter;
+	struct idr map_idr;
 
 	u16 safe_val; /* Value to rest the crossbar lines */
 	u32 xbar_requests; /* number of DMA requests connected to XBAR */
@@ -51,7 +50,7 @@  static void ti_dma_xbar_free(struct device *dev, void *route_data)
 		map->xbar_in, map->xbar_out);
 
 	ti_dma_xbar_write(xbar->iomem, map->xbar_out, xbar->safe_val);
-	idr_remove(&map_idr, map->xbar_out);
+	idr_remove(&xbar->map_idr, map->xbar_out);
 	kfree(map);
 }
 
@@ -81,7 +80,7 @@  static void *ti_dma_xbar_route_allocate(struct of_phandle_args *dma_spec,
 		return ERR_PTR(-ENOMEM);
 	}
 
-	map->xbar_out = idr_alloc(&map_idr, NULL, 0, xbar->dma_requests,
+	map->xbar_out = idr_alloc(&xbar->map_idr, NULL, 0, xbar->dma_requests,
 				  GFP_KERNEL);
 	map->xbar_in = (u16)dma_spec->args[0];
 
@@ -113,6 +112,8 @@  static int ti_dma_xbar_probe(struct platform_device *pdev)
 	if (!xbar)
 		return -ENOMEM;
 
+	idr_init(&xbar->map_idr);
+
 	dma_node = of_parse_phandle(node, "dma-masters", 0);
 	if (!dma_node) {
 		dev_err(&pdev->dev, "Can't get DMA master node\n");