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android_kernel_motorola_sm6225/drivers/pci/hotplug/pciehp_ctrl.c
Ingo Molnar 6aa4cdd071 [PATCH] PCI hotplug: convert semaphores to mutex 
semaphore to mutex conversion.

the conversion was generated via scripts, and the result was validated
automatically via a script as well.

build tested with allyesconfig.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-03-23 14:35:10 -08:00

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/*
* PCI Express Hot Plug Controller Driver
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001 IBM Corp.
* Copyright (C) 2003-2004 Intel Corporation
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/smp_lock.h>
#include <linux/pci.h>
#include "../pci.h"
#include "pciehp.h"
static void interrupt_event_handler(struct controller *ctrl);
static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */
static int event_finished;
static unsigned long pushbutton_pending; /* = 0 */
static unsigned long surprise_rm_pending; /* = 0 */
u8 pciehp_handle_attention_button(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
u8 rc = 0;
u8 getstatus;
struct event_info *taskInfo;
/* Attention Button Change */
dbg("pciehp: Attention button interrupt received.\n");
/* This is the structure that tells the worker thread what to do */
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
taskInfo->hp_slot = hp_slot;
rc++;
/*
* Button pressed - See if need to TAKE ACTION!!!
*/
info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_BUTTON_PRESS;
if ((p_slot->state == BLINKINGON_STATE)
|| (p_slot->state == BLINKINGOFF_STATE)) {
/* Cancel if we are still blinking; this means that we press the
* attention again before the 5 sec. limit expires to cancel hot-add
* or hot-remove
*/
taskInfo->event_type = INT_BUTTON_CANCEL;
info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
} else if ((p_slot->state == POWERON_STATE)
|| (p_slot->state == POWEROFF_STATE)) {
/* Ignore if the slot is on power-on or power-off state; this
* means that the previous attention button action to hot-add or
* hot-remove is undergoing
*/
taskInfo->event_type = INT_BUTTON_IGNORE;
info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
}
if (rc)
up(&event_semaphore); /* signal event thread that new event is posted */
return 0;
}
u8 pciehp_handle_switch_change(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
u8 rc = 0;
u8 getstatus;
struct event_info *taskInfo;
/* Switch Change */
dbg("pciehp: Switch interrupt received.\n");
/* This is the structure that tells the worker thread
* what to do
*/
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
taskInfo->hp_slot = hp_slot;
rc++;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (getstatus) {
/*
* Switch opened
*/
info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_SWITCH_OPEN;
} else {
/*
* Switch closed
*/
info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_SWITCH_CLOSE;
}
if (rc)
up(&event_semaphore); /* signal event thread that new event is posted */
return rc;
}
u8 pciehp_handle_presence_change(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
u8 presence_save, rc = 0;
struct event_info *taskInfo;
/* Presence Change */
dbg("pciehp: Presence/Notify input change.\n");
/* This is the structure that tells the worker thread
* what to do
*/
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
taskInfo->hp_slot = hp_slot;
rc++;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
/* Switch is open, assume a presence change
* Save the presence state
*/
p_slot->hpc_ops->get_adapter_status(p_slot, &presence_save);
if (presence_save) {
/*
* Card Present
*/
info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_PRESENCE_ON;
} else {
/*
* Not Present
*/
info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_PRESENCE_OFF;
}
if (rc)
up(&event_semaphore); /* signal event thread that new event is posted */
return rc;
}
u8 pciehp_handle_power_fault(u8 hp_slot, void *inst_id)
{
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
u8 rc = 0;
struct event_info *taskInfo;
/* power fault */
dbg("pciehp: Power fault interrupt received.\n");
/* this is the structure that tells the worker thread
* what to do
*/
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
taskInfo->hp_slot = hp_slot;
rc++;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
/*
* power fault Cleared
*/
info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_POWER_FAULT_CLEAR;
} else {
/*
* power fault
*/
info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_POWER_FAULT;
info("power fault bit %x set\n", hp_slot);
}
if (rc)
up(&event_semaphore); /* signal event thread that new event is posted */
return rc;
}
/* The following routines constitute the bulk of the
hotplug controller logic
*/
static void set_slot_off(struct controller *ctrl, struct slot * pslot)
{
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
/* turn off slot, turn on Amber LED, turn off Green LED if supported*/
if (POWER_CTRL(ctrl->ctrlcap)) {
if (pslot->hpc_ops->power_off_slot(pslot)) {
err("%s: Issue of Slot Power Off command failed\n", __FUNCTION__);
mutex_unlock(&ctrl->crit_sect);
return;
}
wait_for_ctrl_irq (ctrl);
}
if (PWR_LED(ctrl->ctrlcap)) {
pslot->hpc_ops->green_led_off(pslot);
wait_for_ctrl_irq (ctrl);
}
if (ATTN_LED(ctrl->ctrlcap)) {
if (pslot->hpc_ops->set_attention_status(pslot, 1)) {
err("%s: Issue of Set Attention Led command failed\n", __FUNCTION__);
mutex_unlock(&ctrl->crit_sect);
return;
}
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
}
/**
* board_added - Called after a board has been added to the system.
*
* Turns power on for the board
* Configures board
*
*/
static int board_added(struct slot *p_slot)
{
u8 hp_slot;
int rc = 0;
struct controller *ctrl = p_slot->ctrl;
hp_slot = p_slot->device - ctrl->slot_device_offset;
dbg("%s: slot device, slot offset, hp slot = %d, %d ,%d\n",
__FUNCTION__, p_slot->device,
ctrl->slot_device_offset, hp_slot);
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
if (POWER_CTRL(ctrl->ctrlcap)) {
/* Power on slot */
rc = p_slot->hpc_ops->power_on_slot(p_slot);
if (rc) {
mutex_unlock(&ctrl->crit_sect);
return -1;
}
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
if (PWR_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->green_led_blink(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
/* Wait for ~1 second */
wait_for_ctrl_irq (ctrl);
/* Check link training status */
rc = p_slot->hpc_ops->check_lnk_status(ctrl);
if (rc) {
err("%s: Failed to check link status\n", __FUNCTION__);
set_slot_off(ctrl, p_slot);
return rc;
}
/* Check for a power fault */
if (p_slot->hpc_ops->query_power_fault(p_slot)) {
dbg("%s: power fault detected\n", __FUNCTION__);
rc = POWER_FAILURE;
goto err_exit;
}
rc = pciehp_configure_device(p_slot);
if (rc) {
err("Cannot add device 0x%x:%x\n", p_slot->bus,
p_slot->device);
goto err_exit;
}
/*
* Some PCI Express root ports require fixup after hot-plug operation.
*/
if (pcie_mch_quirk)
pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
if (PWR_LED(ctrl->ctrlcap)) {
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
p_slot->hpc_ops->green_led_on(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
}
return 0;
err_exit:
set_slot_off(ctrl, p_slot);
return -1;
}
/**
* remove_board - Turns off slot and LED's
*
*/
static int remove_board(struct slot *p_slot)
{
u8 device;
u8 hp_slot;
int rc;
struct controller *ctrl = p_slot->ctrl;
if (pciehp_unconfigure_device(p_slot))
return 1;
device = p_slot->device;
hp_slot = p_slot->device - ctrl->slot_device_offset;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
if (POWER_CTRL(ctrl->ctrlcap)) {
/* power off slot */
rc = p_slot->hpc_ops->power_off_slot(p_slot);
if (rc) {
err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
mutex_unlock(&ctrl->crit_sect);
return rc;
}
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
if (PWR_LED(ctrl->ctrlcap)) {
/* turn off Green LED */
p_slot->hpc_ops->green_led_off(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
return 0;
}
static void pushbutton_helper_thread(unsigned long data)
{
pushbutton_pending = data;
up(&event_semaphore);
}
/**
* pciehp_pushbutton_thread
*
* Scheduled procedure to handle blocking stuff for the pushbuttons
* Handles all pending events and exits.
*
*/
static void pciehp_pushbutton_thread(unsigned long slot)
{
struct slot *p_slot = (struct slot *) slot;
u8 getstatus;
pushbutton_pending = 0;
if (!p_slot) {
dbg("%s: Error! slot NULL\n", __FUNCTION__);
return;
}
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (getstatus) {
p_slot->state = POWEROFF_STATE;
dbg("%s: disabling bus:device(%x:%x)\n", __FUNCTION__,
p_slot->bus, p_slot->device);
pciehp_disable_slot(p_slot);
p_slot->state = STATIC_STATE;
} else {
p_slot->state = POWERON_STATE;
dbg("%s: adding bus:device(%x:%x)\n", __FUNCTION__,
p_slot->bus, p_slot->device);
if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
/* Wait for exclusive access to hardware */
mutex_lock(&p_slot->ctrl->crit_sect);
p_slot->hpc_ops->green_led_off(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (p_slot->ctrl);
/* Done with exclusive hardware access */
mutex_unlock(&p_slot->ctrl->crit_sect);
}
p_slot->state = STATIC_STATE;
}
return;
}
/**
* pciehp_surprise_rm_thread
*
* Scheduled procedure to handle blocking stuff for the surprise removal
* Handles all pending events and exits.
*
*/
static void pciehp_surprise_rm_thread(unsigned long slot)
{
struct slot *p_slot = (struct slot *) slot;
u8 getstatus;
surprise_rm_pending = 0;
if (!p_slot) {
dbg("%s: Error! slot NULL\n", __FUNCTION__);
return;
}
p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (!getstatus) {
p_slot->state = POWEROFF_STATE;
dbg("%s: removing bus:device(%x:%x)\n",
__FUNCTION__, p_slot->bus, p_slot->device);
pciehp_disable_slot(p_slot);
p_slot->state = STATIC_STATE;
} else {
p_slot->state = POWERON_STATE;
dbg("%s: adding bus:device(%x:%x)\n",
__FUNCTION__, p_slot->bus, p_slot->device);
if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
/* Wait for exclusive access to hardware */
mutex_lock(&p_slot->ctrl->crit_sect);
p_slot->hpc_ops->green_led_off(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (p_slot->ctrl);
/* Done with exclusive hardware access */
mutex_unlock(&p_slot->ctrl->crit_sect);
}
p_slot->state = STATIC_STATE;
}
return;
}
/* this is the main worker thread */
static int event_thread(void* data)
{
struct controller *ctrl;
lock_kernel();
daemonize("pciehpd_event");
unlock_kernel();
while (1) {
dbg("!!!!event_thread sleeping\n");
down_interruptible (&event_semaphore);
dbg("event_thread woken finished = %d\n", event_finished);
if (event_finished || signal_pending(current))
break;
/* Do stuff here */
if (pushbutton_pending)
pciehp_pushbutton_thread(pushbutton_pending);
else if (surprise_rm_pending)
pciehp_surprise_rm_thread(surprise_rm_pending);
else
for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next)
interrupt_event_handler(ctrl);
}
dbg("event_thread signals exit\n");
up(&event_exit);
return 0;
}
int pciehp_event_start_thread(void)
{
int pid;
/* initialize our semaphores */
init_MUTEX_LOCKED(&event_exit);
event_finished=0;
init_MUTEX_LOCKED(&event_semaphore);
pid = kernel_thread(event_thread, NULL, 0);
if (pid < 0) {
err ("Can't start up our event thread\n");
return -1;
}
return 0;
}
void pciehp_event_stop_thread(void)
{
event_finished = 1;
up(&event_semaphore);
down(&event_exit);
}
static int update_slot_info(struct slot *slot)
{
struct hotplug_slot_info *info;
/* char buffer[SLOT_NAME_SIZE]; */
int result;
info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
/* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */
slot->hpc_ops->get_power_status(slot, &(info->power_status));
slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
/* result = pci_hp_change_slot_info(buffer, info); */
result = pci_hp_change_slot_info(slot->hotplug_slot, info);
kfree (info);
return result;
}
static void interrupt_event_handler(struct controller *ctrl)
{
int loop = 0;
int change = 1;
u8 hp_slot;
u8 getstatus;
struct slot *p_slot;
while (change) {
change = 0;
for (loop = 0; loop < MAX_EVENTS; loop++) {
if (ctrl->event_queue[loop].event_type != 0) {
hp_slot = ctrl->event_queue[loop].hp_slot;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
dbg("button cancel\n");
del_timer(&p_slot->task_event);
switch (p_slot->state) {
case BLINKINGOFF_STATE:
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
if (PWR_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->green_led_on(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
if (ATTN_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->set_attention_status(p_slot, 0);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
break;
case BLINKINGON_STATE:
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
if (PWR_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->green_led_off(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
if (ATTN_LED(ctrl->ctrlcap)){
p_slot->hpc_ops->set_attention_status(p_slot, 0);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
break;
default:
warn("Not a valid state\n");
return;
}
info(msg_button_cancel, p_slot->number);
p_slot->state = STATIC_STATE;
}
/* ***********Button Pressed (No action on 1st press...) */
else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
if (ATTN_BUTTN(ctrl->ctrlcap)) {
dbg("Button pressed\n");
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (getstatus) {
/* slot is on */
dbg("slot is on\n");
p_slot->state = BLINKINGOFF_STATE;
info(msg_button_off, p_slot->number);
} else {
/* slot is off */
dbg("slot is off\n");
p_slot->state = BLINKINGON_STATE;
info(msg_button_on, p_slot->number);
}
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
/* blink green LED and turn off amber */
if (PWR_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->green_led_blink(p_slot);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
if (ATTN_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->set_attention_status(p_slot, 0);
/* Wait for the command to complete */
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
init_timer(&p_slot->task_event);
p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
p_slot->task_event.data = (unsigned long) p_slot;
add_timer(&p_slot->task_event);
}
}
/***********POWER FAULT********************/
else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
if (POWER_CTRL(ctrl->ctrlcap)) {
dbg("power fault\n");
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
if (ATTN_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->set_attention_status(p_slot, 1);
wait_for_ctrl_irq (ctrl);
}
if (PWR_LED(ctrl->ctrlcap)) {
p_slot->hpc_ops->green_led_off(p_slot);
wait_for_ctrl_irq (ctrl);
}
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
}
}
/***********SURPRISE REMOVAL********************/
else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) ||
(ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) {
if (HP_SUPR_RM(ctrl->ctrlcap)) {
dbg("Surprise Removal\n");
if (p_slot) {
surprise_rm_pending = (unsigned long) p_slot;
up(&event_semaphore);
update_slot_info(p_slot);
}
}
} else {
/* refresh notification */
if (p_slot)
update_slot_info(p_slot);
}
ctrl->event_queue[loop].event_type = 0;
change = 1;
}
} /* End of FOR loop */
}
}
int pciehp_enable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
int rc;
/* Check to see if (latch closed, card present, power off) */
mutex_lock(&p_slot->ctrl->crit_sect);
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (rc || !getstatus) {
info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
mutex_unlock(&p_slot->ctrl->crit_sect);
return 1;
}
if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (rc || getstatus) {
info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
mutex_unlock(&p_slot->ctrl->crit_sect);
return 1;
}
}
if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (rc || getstatus) {
info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
mutex_unlock(&p_slot->ctrl->crit_sect);
return 1;
}
}
mutex_unlock(&p_slot->ctrl->crit_sect);
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
rc = board_added(p_slot);
if (rc) {
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
}
if (p_slot)
update_slot_info(p_slot);
return rc;
}
int pciehp_disable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
int ret = 0;
if (!p_slot->ctrl)
return 1;
/* Check to see if (latch closed, card present, power on) */
mutex_lock(&p_slot->ctrl->crit_sect);
if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) {
ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (ret || !getstatus) {
info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
mutex_unlock(&p_slot->ctrl->crit_sect);
return 1;
}
}
if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (ret || getstatus) {
info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
mutex_unlock(&p_slot->ctrl->crit_sect);
return 1;
}
}
if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (ret || !getstatus) {
info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
mutex_unlock(&p_slot->ctrl->crit_sect);
return 1;
}
}
mutex_unlock(&p_slot->ctrl->crit_sect);
ret = remove_board(p_slot);
update_slot_info(p_slot);
return ret;
}
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