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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2008-05-28 10:01:03 +0400
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-06-10 21:59:53 +0400
commitac9c052d10d8d6f46a30cb46c0d6d753997c299f (patch)
tree15c252f9a0addcc944aa7e453bf68b174dfc38fe /drivers/pci/hotplug/shpchp.h
parentd737bdc141f0f040171fffbb7f9e08a825b27aab (diff)
downloadlinux-ac9c052d10d8d6f46a30cb46c0d6d753997c299f.tar.xz
shpchp: check firmware before taking control
Fix the following problems of shpchp driver about getting hotplug control from firmware. - The shpchp driver must not control the hotplug controller if it fails to get control from the firmware. But current shpchp controls the hotplug controller regardless the result, because it doesn't check the return value of get_hp_hw_control_from_firmware(). - Current shpchp driver doesn't support _OSC. The pciehp driver already have the code for evaluating _OSC and OSHP and shpchp and pciehp can share it. So this patch move that code from pciehp to acpi_pcihp.c. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/hotplug/shpchp.h')
-rw-r--r--drivers/pci/hotplug/shpchp.h14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index f66e8d6315ab..8a026f750deb 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -170,6 +170,7 @@ extern void shpchp_queue_pushbutton_work(struct work_struct *work);
extern int shpc_init( struct controller *ctrl, struct pci_dev *pdev);
#ifdef CONFIG_ACPI
+#include <linux/pci-acpi.h>
static inline int get_hp_params_from_firmware(struct pci_dev *dev,
struct hotplug_params *hpp)
{
@@ -177,14 +178,15 @@ static inline int get_hp_params_from_firmware(struct pci_dev *dev,
return -ENODEV;
return 0;
}
-#define get_hp_hw_control_from_firmware(pdev) \
- do { \
- if (DEVICE_ACPI_HANDLE(&(pdev->dev))) \
- acpi_run_oshp(DEVICE_ACPI_HANDLE(&(pdev->dev)));\
- } while (0)
+
+static inline int get_hp_hw_control_from_firmware(struct pci_dev *dev)
+{
+ u32 flags = OSC_SHPC_NATIVE_HP_CONTROL;
+ return acpi_get_hp_hw_control_from_firmware(dev, flags);
+}
#else
#define get_hp_params_from_firmware(dev, hpp) (-ENODEV)
-#define get_hp_hw_control_from_firmware(dev) do { } while (0)
+#define get_hp_hw_control_from_firmware(dev) (0)
#endif
struct ctrl_reg {