PCI: Remove NULL device handling from PCI DMA API

Historically some ISA drivers used the old PCI DMA API with a NULL pdev
argument, but these days this isn't used and not too useful due to the
per-device DMA ops, so remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/include/linux/pci-dma-compat.h b/include/linux/pci-dma-compat.h
index d1f9fdade1e063dc343340646a7e21289ca7cf8a..0dd1a3f7b3094b0ef531e7f20b6df33a5eb5e78d 100644 (file)
--- a/include/linux/pci-dma-compat.h
+++ b/include/linux/pci-dma-compat.h
@@ -17,91 +17,90 @@ static inline void *
 pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
                     dma_addr_t *dma_handle)
 {
-       return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle, GFP_ATOMIC);
+       return dma_alloc_coherent(&hwdev->dev, size, dma_handle, GFP_ATOMIC);
 }
 
 static inline void *
 pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
                      dma_addr_t *dma_handle)
 {
-       return dma_zalloc_coherent(hwdev == NULL ? NULL : &hwdev->dev,
-                                  size, dma_handle, GFP_ATOMIC);
+       return dma_zalloc_coherent(&hwdev->dev, size, dma_handle, GFP_ATOMIC);
 }
 
 static inline void
 pci_free_consistent(struct pci_dev *hwdev, size_t size,
                    void *vaddr, dma_addr_t dma_handle)
 {
-       dma_free_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, vaddr, dma_handle);
+       dma_free_coherent(&hwdev->dev, size, vaddr, dma_handle);
 }
 
 static inline dma_addr_t
 pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction)
 {
-       return dma_map_single(hwdev == NULL ? NULL : &hwdev->dev, ptr, size, (enum dma_data_direction)direction);
+       return dma_map_single(&hwdev->dev, ptr, size, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
                 size_t size, int direction)
 {
-       dma_unmap_single(hwdev == NULL ? NULL : &hwdev->dev, dma_addr, size, (enum dma_data_direction)direction);
+       dma_unmap_single(&hwdev->dev, dma_addr, size, (enum dma_data_direction)direction);
 }
 
 static inline dma_addr_t
 pci_map_page(struct pci_dev *hwdev, struct page *page,
             unsigned long offset, size_t size, int direction)
 {
-       return dma_map_page(hwdev == NULL ? NULL : &hwdev->dev, page, offset, size, (enum dma_data_direction)direction);
+       return dma_map_page(&hwdev->dev, page, offset, size, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address,
               size_t size, int direction)
 {
-       dma_unmap_page(hwdev == NULL ? NULL : &hwdev->dev, dma_address, size, (enum dma_data_direction)direction);
+       dma_unmap_page(&hwdev->dev, dma_address, size, (enum dma_data_direction)direction);
 }
 
 static inline int
 pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
           int nents, int direction)
 {
-       return dma_map_sg(hwdev == NULL ? NULL : &hwdev->dev, sg, nents, (enum dma_data_direction)direction);
+       return dma_map_sg(&hwdev->dev, sg, nents, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
             int nents, int direction)
 {
-       dma_unmap_sg(hwdev == NULL ? NULL : &hwdev->dev, sg, nents, (enum dma_data_direction)direction);
+       dma_unmap_sg(&hwdev->dev, sg, nents, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle,
                    size_t size, int direction)
 {
-       dma_sync_single_for_cpu(hwdev == NULL ? NULL : &hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
+       dma_sync_single_for_cpu(&hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
                    size_t size, int direction)
 {
-       dma_sync_single_for_device(hwdev == NULL ? NULL : &hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
+       dma_sync_single_for_device(&hwdev->dev, dma_handle, size, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg,
                int nelems, int direction)
 {
-       dma_sync_sg_for_cpu(hwdev == NULL ? NULL : &hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
+       dma_sync_sg_for_cpu(&hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
 }
 
 static inline void
 pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg,
                int nelems, int direction)
 {
-       dma_sync_sg_for_device(hwdev == NULL ? NULL : &hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
+       dma_sync_sg_for_device(&hwdev->dev, sg, nelems, (enum dma_data_direction)direction);
 }
 
 static inline int