From 36ad7d2b9e9bde9aeb097fcfd3c033b5c010f92a Mon Sep 17 00:00:00 2001 From: Sinan Kaya Date: Wed, 19 Dec 2018 22:46:53 +0000 Subject: 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 Signed-off-by: Rafael J. Wysocki --- drivers/acpi/reboot.c | 32 +++++++++++++++++++------------- 1 file changed, 19 insertions(+), 13 deletions(-) (limited to 'drivers/acpi/reboot.c') 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 #include +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: -- cgit v1.2.3