Commit 144d204d authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Bjorn Helgaas
Browse files

PCI: Introduce pci_resource_n() 

Introduce pci_resource_n() and replace open-coded implementations of it
in pci.h.

Link: https://lore.kernel.org/r/20230330162434.35055-3-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@linaro.org>
parent fe15c26e

include/linux/pci.h

+7 −8
Original line number Diff line number Diff line
@@ -1994,14 +1994,13 @@ int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma); 
 * These helpers provide future and backwards compatibility

 * for accessing popular PCI BAR info

 */

#define pci_resource_start(dev, bar)	((dev)->resource[(bar)].start)

#define pci_resource_end(dev, bar)	((dev)->resource[(bar)].end)

#define pci_resource_flags(dev, bar)	((dev)->resource[(bar)].flags)

#define pci_resource_n(dev, bar)	(&(dev)->resource[(bar)])

#define pci_resource_start(dev, bar)	(pci_resource_n(dev, bar)->start)

#define pci_resource_end(dev, bar)	(pci_resource_n(dev, bar)->end)

#define pci_resource_flags(dev, bar)	(pci_resource_n(dev, bar)->flags)

#define pci_resource_len(dev,bar)					\

	((pci_resource_end((dev), (bar)) == 0) ? 0 :	\

							\

	 (pci_resource_end((dev), (bar)) -		\

	  pci_resource_start((dev), (bar)) + 1))

	(pci_resource_end((dev), (bar)) ? 				\

	 resource_size(pci_resource_n((dev), (bar))) : 0)



/*

 * Similar to the helpers above, these manipulate per-pci_dev