dma: mv_xor: remove the pool_size from platform_data

The pool_size is always PAGE_SIZE, and since it is a software
configuration paramter (and not a hardware description parameter), we
cannot make it part of the Device Tree binding, so we'd better remove
it from the platform_data as well.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

4 files changed, 9 insertions, 26 deletions

diff --git a/arch/arm/plat-orion/common.c b/arch/arm/plat-orion/common.c
index 09d836060bf..2d4b6414609 100644
--- a/arch/arm/plat-orion/common.c
+++ b/arch/arm/plat-orion/common.c
@@ -625,14 +625,7 @@ static struct resource orion_xor0_shared_resources[] = {
         },
 };
 
-static struct mv_xor_channel_data orion_xor0_channels_data[2] = {
-        {
-                .pool_size      = PAGE_SIZE,
-        },
-        {
-                .pool_size      = PAGE_SIZE,
-        },
-};
+static struct mv_xor_channel_data orion_xor0_channels_data[2];
 
 static struct mv_xor_platform_data orion_xor0_pdata = {
         .channels = orion_xor0_channels_data,
@@ -698,14 +691,7 @@ static struct resource orion_xor1_shared_resources[] = {
         },
 };
 
-static struct mv_xor_channel_data orion_xor1_channels_data[2] = {
-        {
-                .pool_size      = PAGE_SIZE,
-        },
-        {
-                .pool_size      = PAGE_SIZE,
-        },
-};
+static struct mv_xor_channel_data orion_xor1_channels_data[2];
 
 static struct mv_xor_platform_data orion_xor1_pdata = {
         .channels = orion_xor1_channels_data,
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index fc983bf3843..ec741b4607e 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -603,7 +603,7 @@ static int mv_xor_alloc_chan_resources(struct dma_chan *chan)
         int idx;
         struct mv_xor_chan *mv_chan = to_mv_xor_chan(chan);
         struct mv_xor_desc_slot *slot = NULL;
-        int num_descs_in_pool = mv_chan->pool_size/MV_XOR_SLOT_SIZE;
+        int num_descs_in_pool = MV_XOR_POOL_SIZE/MV_XOR_SLOT_SIZE;
 
         /* Allocate descriptor slots */
         idx = mv_chan->slots_allocated;
@@ -1074,7 +1074,7 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
 
         dma_async_device_unregister(&mv_chan->dmadev);
 
-        dma_free_coherent(dev, mv_chan->pool_size,
+        dma_free_coherent(dev, MV_XOR_POOL_SIZE,
                           mv_chan->dma_desc_pool_virt, mv_chan->dma_desc_pool);
 
         list_for_each_entry_safe(chan, _chan, &mv_chan->dmadev.channels,
@@ -1088,8 +1088,7 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
 static struct mv_xor_chan *
 mv_xor_channel_add(struct mv_xor_device *xordev,
                    struct platform_device *pdev,
-                   int idx, dma_cap_mask_t cap_mask,
-                   size_t pool_size, int irq)
+                   int idx, dma_cap_mask_t cap_mask, int irq)
 {
         int ret = 0;
         struct mv_xor_chan *mv_chan;
@@ -1109,9 +1108,8 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
          * note: writecombine gives slightly better performance, but
          * requires that we explicitly flush the writes
          */
-        mv_chan->pool_size = pool_size;
         mv_chan->dma_desc_pool_virt =
-          dma_alloc_writecombine(&pdev->dev, mv_chan->pool_size,
+          dma_alloc_writecombine(&pdev->dev, MV_XOR_POOL_SIZE,
                                  &mv_chan->dma_desc_pool, GFP_KERNEL);
         if (!mv_chan->dma_desc_pool_virt)
                 return ERR_PTR(-ENOMEM);
@@ -1193,7 +1191,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
         return mv_chan;
 
  err_free_dma:
-        dma_free_coherent(&pdev->dev, pool_size,
+        dma_free_coherent(&pdev->dev, MV_XOR_POOL_SIZE,
                           mv_chan->dma_desc_pool_virt, mv_chan->dma_desc_pool);
         return ERR_PTR(ret);
 }
@@ -1296,8 +1294,7 @@ static int mv_xor_probe(struct platform_device *pdev)
 
                         xordev->channels[i] =
                                 mv_xor_channel_add(xordev, pdev, i,
-                                                   cd->cap_mask,
-                                                   cd->pool_size, irq);
+                                                   cd->cap_mask, irq);
                         if (IS_ERR(xordev->channels[i])) {
                                 ret = PTR_ERR(xordev->channels[i]);
                                 goto err_channel_add;
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index dab9f30e564..698b4487b34 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -24,6 +24,7 @@
 #include <linux/interrupt.h>
 
 #define USE_TIMER
+#define MV_XOR_POOL_SIZE                PAGE_SIZE
 #define MV_XOR_SLOT_SIZE                64
 #define MV_XOR_THRESHOLD                1
 #define MV_XOR_MAX_CHANNELS             2
diff --git a/include/linux/platform_data/dma-mv_xor.h b/include/linux/platform_data/dma-mv_xor.h
index b18dc249618..8ec18f64e39 100644
--- a/include/linux/platform_data/dma-mv_xor.h
+++ b/include/linux/platform_data/dma-mv_xor.h
@@ -14,7 +14,6 @@
 
 struct mv_xor_channel_data {
         dma_cap_mask_t                  cap_mask;
-        size_t                          pool_size;
 };
 
 struct mv_xor_platform_data {