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ACPI: Move PCI reset to a separate function 

Getting ready to factor out PCI specific code when CONFIG_PCI is unset.
Create a acpi_pci_reset() that kick starts PCI specific reset.

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sinan Kaya 2018-12-19 22:46:53 +00:00 committed by Rafael J. Wysocki
parent 7566ec393f
commit 36ad7d2b9e
1 changed files with 19 additions and 13 deletions
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32
drivers/acpi/reboot.c
View File

@ -4,11 +4,27 @@
#include <linux/acpi.h>
#include <acpi/reboot.h>
static void acpi_pci_reboot(struct acpi_generic_address *rr, u8 reset_value)
{
unsigned int devfn;
struct pci_bus *bus0;
/* The reset register can only live on bus 0. */
bus0 = pci_find_bus(0, 0);
if (!bus0)
return;
/* Form PCI device/function pair. */
devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
(rr->address >> 16) & 0xffff);
pr_debug("Resetting with ACPI PCI RESET_REG.\n");
/* Write the value that resets us. */
pci_bus_write_config_byte(bus0, devfn,
(rr->address & 0xffff), reset_value);
}
void acpi_reboot(void)
{
struct acpi_generic_address *rr;
struct pci_bus *bus0;
unsigned int devfn;
u8 reset_value;
if (acpi_disabled)
@ -33,17 +49,7 @@ void acpi_reboot(void)
* on a device on bus 0. */
switch (rr->space_id) {
case ACPI_ADR_SPACE_PCI_CONFIG:
/* The reset register can only live on bus 0. */
bus0 = pci_find_bus(0, 0);
if (!bus0)
return;
/* Form PCI device/function pair. */
devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
(rr->address >> 16) & 0xffff);
printk(KERN_DEBUG "Resetting with ACPI PCI RESET_REG.\n");
/* Write the value that resets us. */
pci_bus_write_config_byte(bus0, devfn,
(rr->address & 0xffff), reset_value);
acpi_pci_reboot(rr, reset_value);
break;
case ACPI_ADR_SPACE_SYSTEM_MEMORY: