dmaengine: hsu: remove platform data

There are no platforms where it's not possible to calculate
the number of channels based on IO space length, and since
that is the only purpose for struct hsu_dma_platform_data,
removing it.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

5 files changed, 9 insertions, 23 deletions

diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c
index 7669c7dd1e34..823ad728aecf 100644
--- a/drivers/dma/hsu/hsu.c
+++ b/drivers/dma/hsu/hsu.c
@@ -146,7 +146,7 @@ irqreturn_t hsu_dma_irq(struct hsu_dma_chip *chip, unsigned short nr)
         u32 sr;
 
         /* Sanity check */
-        if (nr >= chip->pdata->nr_channels)
+        if (nr >= chip->hsu->nr_channels)
                 return IRQ_NONE;
 
         hsuc = &chip->hsu->chan[nr];
@@ -375,7 +375,6 @@ static void hsu_dma_free_chan_resources(struct dma_chan *chan)
 int hsu_dma_probe(struct hsu_dma_chip *chip)
 {
         struct hsu_dma *hsu;
-        struct hsu_dma_platform_data *pdata = chip->pdata;
         void __iomem *addr = chip->regs + chip->offset;
         unsigned short i;
         int ret;
@@ -386,25 +385,16 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
 
         chip->hsu = hsu;
 
-        if (!pdata) {
-                pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
-                if (!pdata)
-                        return -ENOMEM;
+        /* Calculate nr_channels from the IO space length */
+        hsu->nr_channels = (chip->length - chip->offset) / HSU_DMA_CHAN_LENGTH;
 
-                chip->pdata = pdata;
-
-                /* Guess nr_channels from the IO space length */
-                pdata->nr_channels = (chip->length - chip->offset) /
-                                     HSU_DMA_CHAN_LENGTH;
-        }
-
-        hsu->chan = devm_kcalloc(chip->dev, pdata->nr_channels,
+        hsu->chan = devm_kcalloc(chip->dev, hsu->nr_channels,
                                  sizeof(*hsu->chan), GFP_KERNEL);
         if (!hsu->chan)
                 return -ENOMEM;
 
         INIT_LIST_HEAD(&hsu->dma.channels);
-        for (i = 0; i < pdata->nr_channels; i++) {
+        for (i = 0; i < hsu->nr_channels; i++) {
                 struct hsu_dma_chan *hsuc = &hsu->chan[i];
 
                 hsuc->vchan.desc_free = hsu_dma_desc_free;
@@ -440,7 +430,7 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
         if (ret)
                 return ret;
 
-        dev_info(chip->dev, "Found HSU DMA, %d channels\n", pdata->nr_channels);
+        dev_info(chip->dev, "Found HSU DMA, %d channels\n", hsu->nr_channels);
         return 0;
 }
 EXPORT_SYMBOL_GPL(hsu_dma_probe);
@@ -452,7 +442,7 @@ int hsu_dma_remove(struct hsu_dma_chip *chip)
 
         dma_async_device_unregister(&hsu->dma);
 
-        for (i = 0; i < chip->pdata->nr_channels; i++) {
+        for (i = 0; i < hsu->nr_channels; i++) {
                 struct hsu_dma_chan *hsuc = &hsu->chan[i];
 
                 tasklet_kill(&hsuc->vchan.task);
diff --git a/drivers/dma/hsu/hsu.h b/drivers/dma/hsu/hsu.h
index eeb9fff66967..f06579c6d548 100644
--- a/drivers/dma/hsu/hsu.h
+++ b/drivers/dma/hsu/hsu.h
@@ -107,6 +107,7 @@ struct hsu_dma {
 
         /* channels */
         struct hsu_dma_chan             *chan;
+        unsigned short                  nr_channels;
 };
 
 static inline struct hsu_dma *to_hsu_dma(struct dma_device *ddev)
diff --git a/drivers/dma/hsu/pci.c b/drivers/dma/hsu/pci.c
index 77879e6ddc4c..e2db76bd56d8 100644
--- a/drivers/dma/hsu/pci.c
+++ b/drivers/dma/hsu/pci.c
@@ -31,7 +31,7 @@ static irqreturn_t hsu_pci_irq(int irq, void *dev)
         irqreturn_t ret = IRQ_NONE;
 
         dmaisr = readl(chip->regs + HSU_PCI_DMAISR);
-        for (i = 0; i < chip->pdata->nr_channels; i++) {
+        for (i = 0; i < chip->hsu->nr_channels; i++) {
                 if (dmaisr & 0x1)
                         ret |= hsu_dma_irq(chip, i);
                 dmaisr >>= 1;
diff --git a/include/linux/dma/hsu.h b/include/linux/dma/hsu.h
index 765b414eef98..79df69dc629c 100644
--- a/include/linux/dma/hsu.h
+++ b/include/linux/dma/hsu.h
@@ -35,7 +35,6 @@ struct hsu_dma_chip {
         unsigned int                    length;
         unsigned int                    offset;
         struct hsu_dma                  *hsu;
-        struct hsu_dma_platform_data    *pdata;
 };
 
 #if IS_ENABLED(CONFIG_HSU_DMA)
diff --git a/include/linux/platform_data/dma-hsu.h b/include/linux/platform_data/dma-hsu.h
index 8a1f6a4920b2..3453fa655502 100644
--- a/include/linux/platform_data/dma-hsu.h
+++ b/include/linux/platform_data/dma-hsu.h
@@ -18,8 +18,4 @@ struct hsu_dma_slave {
         int             chan_id;
 };
 
-struct hsu_dma_platform_data {
-        unsigned short  nr_channels;
-};
-
 #endif /* _PLATFORM_DATA_DMA_HSU_H */