PCI Capabilities are linked in a list that must appear in the first 256
bytes of config space. The pointer to capabilities is of 8 bits.
Change the return type of pci_find_capability() and supporting
functions from int to u8 to match the specification.
Signed-off-by: Puranjay Mohan <puranjay12@xxxxxxxxx>
---
v1 - change return types of supporting functions of pci_find_capability.
---
drivers/pci/pci.c | 8 ++++----
include/linux/pci.h | 4 ++--
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e578d34095e9..5caae09e0d20 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -399,7 +399,7 @@ static int pci_dev_str_match(struct pci_dev *dev, const char *p,
return 1;
}
-static int __pci_find_next_cap_ttl(struct pci_bus *bus, unsigned int devfn,
+static u8 __pci_find_next_cap_ttl(struct pci_bus *bus, unsigned int devfn,
u8 pos, int cap, int *ttl)
{
u8 id;
@@ -438,7 +438,7 @@ int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap)
}
EXPORT_SYMBOL_GPL(pci_find_next_capability);
-static int __pci_bus_find_cap_start(struct pci_bus *bus,
+static u8 __pci_bus_find_cap_start(struct pci_bus *bus,
unsigned int devfn, u8 hdr_type)
{
u16 status;
@@ -477,9 +477,9 @@ static int __pci_bus_find_cap_start(struct pci_bus *bus,
* %PCI_CAP_ID_PCIX PCI-X
* %PCI_CAP_ID_EXP PCI Express
*/
-int pci_find_capability(struct pci_dev *dev, int cap)
+u8 pci_find_capability(struct pci_dev *dev, int cap)
{
- int pos;
+ u8 pos;
pos = __pci_bus_find_cap_start(dev->bus, dev->devfn, dev->hdr_type);
if (pos)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 22207a79762c..19a817702ea9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1063,7 +1063,7 @@ void pci_sort_breadthfirst(void);
/* Generic PCI functions exported to card drivers */
-int pci_find_capability(struct pci_dev *dev, int cap);
+u8 pci_find_capability(struct pci_dev *dev, int cap);
int pci_find_next_capability(struct pci_dev *dev, u8 pos, int 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);
@@ -1719,7 +1719,7 @@ 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)
--
2.27.0
