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Date: Tue, 9 Jan 2018 18:25:44 -0600
From: Bjorn Helgaas <helgaas@...nel.org>
To: Christoph Hellwig <hch@....de>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
linux-pci@...r.kernel.org, linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] pci-dma-compat: remove handling of NULL pdev
arguments
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@....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
>
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