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authorSinan Kaya <okaya@kernel.org>2018-12-19 22:46:53 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-12-20 10:19:49 +0100
commit36ad7d2b9e9bde9aeb097fcfd3c033b5c010f92a (patch)
treed724d7500b61c11d9630ceba376adba59fd84591 /drivers/acpi/reboot.c
parent7566ec393f4161572ba6f11ad5171fd5d59b0fbd (diff)
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>
Diffstat (limited to 'drivers/acpi/reboot.c')
-rw-r--r--drivers/acpi/reboot.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/acpi/reboot.c b/drivers/acpi/reboot.c
index 6fa9c2a4cfe9..d642a9dede52 100644
--- a/drivers/acpi/reboot.c
+++ b/drivers/acpi/reboot.c
@@ -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: