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pciehp: evaluate _OSC/OSHP before controller init

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Current pciehp evaluates _OSC/OSHP method after some controller
initialization is done. So if evaluating _OSC/OSHP is failed, we need
to cleanup already initialized data structures or hardware. This
clearly is not robust way. With this patch, _OSC/OSHP evaluation is
done first.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2008-05-28 14:57:30 +09:00 committed by Jesse Barnes
parent b143b3cc82
commit 125c39f7d2
3 changed files with 10 additions and 18 deletions
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1
drivers/pci/hotplug/pciehp.h
View File

@ -202,6 +202,7 @@ struct hpc_ops {
#include <acpi/actypes.h>
#include <linux/pci-acpi.h>
extern int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev);
#define pciehp_get_hp_hw_control_from_firmware(dev) \
pciehp_acpi_get_hp_hw_control_from_firmware(dev)
static inline int pciehp_get_hp_params_from_firmware(struct pci_dev *dev,

10
drivers/pci/hotplug/pciehp_core.c
View File

@ -444,7 +444,13 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_
struct controller *ctrl;
struct slot *t_slot;
u8 value;
struct pci_dev *pdev;
struct pci_dev *pdev = dev->port;
if (pciehp_force)
dbg("Bypassing BIOS check for pciehp use on %s\n",
pci_name(pdev));
else if (pciehp_get_hp_hw_control_from_firmware(pdev))
goto err_out_none;
ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
if (!ctrl) {
@ -453,8 +459,6 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_
}
INIT_LIST_HEAD(&ctrl->slot_list);
pdev = dev->port;
rc = pcie_init(ctrl, dev);
if (rc) {
dbg("%s: controller initialization failed\n", PCIE_MODULE_NAME);

17
drivers/pci/hotplug/pciehp_hpc.c
View File

@ -1018,7 +1018,7 @@ static struct hpc_ops pciehp_hpc_ops = {
};
#ifdef CONFIG_ACPI
static int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
acpi_status status;
acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
@ -1122,23 +1122,10 @@ int pcie_init_hardware_part2(struct controller *ctrl, struct pcie_device *dev)
if (pcie_write_cmd(ctrl, cmd, mask)) {
err("%s: Cannot enable software notification\n", __func__);
goto abort;
return -1;
}
if (pciehp_force)
dbg("Bypassing BIOS check for pciehp use on %s\n",
pci_name(ctrl->pci_dev));
else if (pciehp_get_hp_hw_control_from_firmware(ctrl->pci_dev))
goto abort_disable_intr;
return 0;
/* We end up here for the many possible ways to fail this API. */
abort_disable_intr:
if (pcie_write_cmd(ctrl, 0, HP_INTR_ENABLE))
err("%s : disabling interrupts failed\n", __func__);
abort:
return -1;
}
static inline void dbg_ctrl(struct controller *ctrl)