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[PATCH] shpchp: Fix slot state handling

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Current SHPCHP driver doesn't care about the confliction between
hotplug operation via sysfs and hotplug operation via attention
button. So if those ware conflicted, slot could be an unexpected
state.

This patch changes SHPCHP driver to handle slot state properly. With
this patch, slot events are handled according to the current slot
state as shown at the Table below.

		Table. Slot States and Event Handling
=========================================================================
Slot State		Event and Action
=========================================================================
STATIC			- Go to POWERON state if user initiates
(Slot enabled,		  insertion request via sysfs
 Slot disabled)		- Go to POWEROFF state if user initiates removal
			  request via sysfs
			- Go to BLINKINGON state if user presses
			  attention button when the slot is disabled
			- Go to BLINKINGOFF state if user presses
			  attention button when the slot is enabled
This commit is contained in:
Kenji Kaneshige
2006-02-21 15:45:48 -08:00
committed by Greg Kroah-Hartman
父節點 f7391f5325
當前提交 a246fa4e9f
共有 3 個文件被更改，包括 181 次插入 和 61 次删除
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7
drivers/pci/hotplug/shpchp.h
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@@ -72,6 +72,7 @@ struct slot {
struct list_head slot_list;
char name[SLOT_NAME_SIZE];
struct work_struct work; /* work for button event */
struct mutex lock;
};
struct event_info {
@@ -181,8 +182,8 @@ struct hotplug_params {
/* sysfs functions for the hotplug controller info */
extern void shpchp_create_ctrl_files (struct controller *ctrl);
extern int shpchp_enable_slot(struct slot *slot);
extern int shpchp_disable_slot(struct slot *slot);
extern int shpchp_sysfs_enable_slot(struct slot *slot);
extern int shpchp_sysfs_disable_slot(struct slot *slot);
extern u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id);
extern u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id);
@@ -200,7 +201,7 @@ extern int shpchprm_get_physical_slot_number(struct controller *ctrl,
u32 *sun, u8 busnum, u8 devnum);
extern void shpchp_remove_ctrl_files(struct controller *ctrl);
extern void cleanup_slots(struct controller *ctrl);
extern void shpchp_pushbutton_thread(void *data);
extern void queue_pushbutton_work(void *data);
/* Global variables */
extern struct list_head shpchp_ctrl_list;