spi: dw-mid: remove redundant dmac member

Instead of using that member we prefer to use dma_dev which represents actual
struct device of the DMA device.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 8 insertions, 5 deletions

diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index deba3c459d68..9ae2eaa228fd 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -39,12 +39,13 @@ static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param)
 {
         struct dw_spi *dws = param;
 
-        return dws->dmac && (&dws->dmac->dev == chan->device->dev);
+        return dws->dma_dev == chan->device->dev;
 }
 
 static int mid_spi_dma_init(struct dw_spi *dws)
 {
         struct mid_dma *dw_dma = dws->dma_priv;
+        struct pci_dev *dma_dev;
         struct intel_mid_dma_slave *rxs, *txs;
         dma_cap_mask_t mask;
 
@@ -52,7 +53,11 @@ static int mid_spi_dma_init(struct dw_spi *dws)
          * Get pci device for DMA controller, currently it could only
          * be the DMA controller of Medfield
          */
-        dws->dmac = pci_get_device(PCI_VENDOR_ID_INTEL, 0x0827, NULL);
+        dma_dev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x0827, NULL);
+        if (!dma_dev)
+                return -ENODEV;
+
+        dws->dma_dev = &dma_dev->dev;
 
         dma_cap_zero(mask);
         dma_cap_set(DMA_SLAVE, mask);
@@ -81,8 +86,7 @@ static int mid_spi_dma_init(struct dw_spi *dws)
 free_rxchan:
         dma_release_channel(dws->rxchan);
 err_exit:
-        return -1;
-
+        return -EBUSY;
 }
 
 static void mid_spi_dma_exit(struct dw_spi *dws)
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index fcd12b6b4697..089fc4ba3ace 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -140,7 +140,6 @@ struct dw_spi {
         dma_addr_t              dma_addr; /* phy address of the Data register */
         struct dw_spi_dma_ops   *dma_ops;
         void                    *dma_priv; /* platform relate info */
-        struct pci_dev          *dmac;
 
         /* Bus interface info */
         void                    *priv;