| Message ID | 20180109203939.5930-4-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
s/pci-dma-compat: remove handling of NULL pdev /PCI: Remove NULL device handling from DMA API/ On Tue, Jan 09, 2018 at 09:39:39PM +0100, Christoph Hellwig wrote: > 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. s/pci/PCI/ I like this a lot, thanks! It looks like "pci_free_consistent(NULL" is still used in drivers/net/ethernet/tundra/tsi108_eth.c. > Signed-off-by: Christoph Hellwig <hch@lst.de> With Mauro's ack on the media/ttusb-dev patches, I could merge the whole series via the PCI tree? > --- > include/linux/pci-dma-compat.h | 27 +++++++++++++-------------- > 1 file changed, 13 insertions(+), 14 deletions(-) > > diff --git a/include/linux/pci-dma-compat.h b/include/linux/pci-dma-compat.h > index d1f9fdade1e0..0dd1a3f7b309 100644 > --- 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 > -- > 2.14.2 >
On Tue, Jan 09, 2018 at 06:25:44PM -0600, Bjorn Helgaas wrote: > It looks like "pci_free_consistent(NULL" is still used in > drivers/net/ethernet/tundra/tsi108_eth.c. Yikes. That one needs to pass the device is the platform dev to the dma_map_* routines to start with, and mixing that with PCI is pretty horrible. I'll add a conversion of that driver to the next resend. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > > With Mauro's ack on the media/ttusb-dev patches, I could merge the > whole series via the PCI tree? Fine with me.
diff --git a/include/linux/pci-dma-compat.h b/include/linux/pci-dma-compat.h index d1f9fdade1e0..0dd1a3f7b309 100644 --- 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
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> --- include/linux/pci-dma-compat.h | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-)