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PCI: Return u8 from pci_find_capability() and similar

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PCI Capabilities are linked in a list that must appear in the first 256
bytes of config space.  Each capabilities list pointer is 8 bits.

Change the return type of pci_find_capability() and supporting functions
from int to u8 to match the specification.

[bhelgaas: change other related interfaces, fix HyperTransport typos]
Link: https://lore.kernel.org/r/20201129164626.12887-1-puranjay12@gmail.com
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Puranjay Mohan
2020-11-29 22:16:26 +05:30
committed by Bjorn Helgaas
parent 3853f9123c
commit f646c2a0a6
2 changed files with 27 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/pci.h
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@@ -1064,12 +1064,13 @@ void pci_sort_breadthfirst(void);
/* Generic PCI functions exported to card drivers */
int pci_find_capability(struct pci_dev *dev, int cap);
int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
u8 pci_find_capability(struct pci_dev *dev, int cap);
u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
int pci_find_ext_capability(struct pci_dev *dev, int cap);
int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
u64 pci_get_dsn(struct pci_dev *dev);
@@ -1280,7 +1281,6 @@ void set_pcie_port_type(struct pci_dev *pdev);
void set_pcie_hotplug_bridge(struct pci_dev *pdev);
/* Functions for PCI Hotplug drivers to use */
int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
unsigned int pci_rescan_bus(struct pci_bus *bus);
void pci_lock_rescan_remove(void);
@@ -1720,7 +1720,7 @@ static inline int __pci_register_driver(struct pci_driver *drv,
static inline int pci_register_driver(struct pci_driver *drv)
{ return 0; }
static inline void pci_unregister_driver(struct pci_driver *drv) { }
static inline int pci_find_capability(struct pci_dev *dev, int cap)
static inline u8 pci_find_capability(struct pci_dev *dev, int cap)
{ return 0; }
static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
int cap)