linux/drivers/pci/hotplug/shpchp_ctrl.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

732 lines
18 KiB
C

/*
* Standard 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/slab.h>
#include <linux/pci.h>
#include <linux/workqueue.h>
#include "../pci.h"
#include "shpchp.h"
static void interrupt_event_handler(struct work_struct *work);
static int shpchp_enable_slot(struct slot *p_slot);
static int shpchp_disable_slot(struct slot *p_slot);
static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
{
struct event_info *info;
info = kmalloc(sizeof(*info), GFP_ATOMIC);
if (!info)
return -ENOMEM;
info->event_type = event_type;
info->p_slot = p_slot;
INIT_WORK(&info->work, interrupt_event_handler);
schedule_work(&info->work);
return 0;
}
u8 shpchp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
{
struct slot *p_slot;
u32 event_type;
/* Attention Button Change */
ctrl_dbg(ctrl, "Attention button interrupt received\n");
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
/*
* Button pressed - See if need to TAKE ACTION!!!
*/
ctrl_info(ctrl, "Button pressed on Slot(%s)\n", slot_name(p_slot));
event_type = INT_BUTTON_PRESS;
queue_interrupt_event(p_slot, event_type);
return 0;
}
u8 shpchp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
{
struct slot *p_slot;
u8 getstatus;
u32 event_type;
/* Switch Change */
ctrl_dbg(ctrl, "Switch interrupt received\n");
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
ctrl_dbg(ctrl, "Card present %x Power status %x\n",
p_slot->presence_save, p_slot->pwr_save);
if (getstatus) {
/*
* Switch opened
*/
ctrl_info(ctrl, "Latch open on Slot(%s)\n", slot_name(p_slot));
event_type = INT_SWITCH_OPEN;
if (p_slot->pwr_save && p_slot->presence_save) {
event_type = INT_POWER_FAULT;
ctrl_err(ctrl, "Surprise Removal of card\n");
}
} else {
/*
* Switch closed
*/
ctrl_info(ctrl, "Latch close on Slot(%s)\n", slot_name(p_slot));
event_type = INT_SWITCH_CLOSE;
}
queue_interrupt_event(p_slot, event_type);
return 1;
}
u8 shpchp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
{
struct slot *p_slot;
u32 event_type;
/* Presence Change */
ctrl_dbg(ctrl, "Presence/Notify input change\n");
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
/*
* Save the presence state
*/
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
if (p_slot->presence_save) {
/*
* Card Present
*/
ctrl_info(ctrl, "Card present on Slot(%s)\n",
slot_name(p_slot));
event_type = INT_PRESENCE_ON;
} else {
/*
* Not Present
*/
ctrl_info(ctrl, "Card not present on Slot(%s)\n",
slot_name(p_slot));
event_type = INT_PRESENCE_OFF;
}
queue_interrupt_event(p_slot, event_type);
return 1;
}
u8 shpchp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
{
struct slot *p_slot;
u32 event_type;
/* Power fault */
ctrl_dbg(ctrl, "Power fault interrupt received\n");
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
/*
* Power fault Cleared
*/
ctrl_info(ctrl, "Power fault cleared on Slot(%s)\n",
slot_name(p_slot));
p_slot->status = 0x00;
event_type = INT_POWER_FAULT_CLEAR;
} else {
/*
* Power fault
*/
ctrl_info(ctrl, "Power fault on Slot(%s)\n", slot_name(p_slot));
event_type = INT_POWER_FAULT;
/* set power fault status for this board */
p_slot->status = 0xFF;
ctrl_info(ctrl, "Power fault bit %x set\n", hp_slot);
}
queue_interrupt_event(p_slot, event_type);
return 1;
}
/* The following routines constitute the bulk of the
hotplug controller logic
*/
static int change_bus_speed(struct controller *ctrl, struct slot *p_slot,
enum pci_bus_speed speed)
{
int rc = 0;
ctrl_dbg(ctrl, "Change speed to %d\n", speed);
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) {
ctrl_err(ctrl, "%s: Issue of set bus speed mode command "
"failed\n", __func__);
return WRONG_BUS_FREQUENCY;
}
return rc;
}
static int fix_bus_speed(struct controller *ctrl, struct slot *pslot,
u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp,
enum pci_bus_speed msp)
{
int rc = 0;
/*
* If other slots on the same bus are occupied, we cannot
* change the bus speed.
*/
if (flag) {
if (asp < bsp) {
ctrl_err(ctrl, "Speed of bus %x and adapter %x "
"mismatch\n", bsp, asp);
rc = WRONG_BUS_FREQUENCY;
}
return rc;
}
if (asp < msp) {
if (bsp != asp)
rc = change_bus_speed(ctrl, pslot, asp);
} else {
if (bsp != msp)
rc = change_bus_speed(ctrl, pslot, msp);
}
return rc;
}
/**
* board_added - Called after a board has been added to the system.
* @p_slot: target &slot
*
* Turns power on for the board.
* Configures board.
*/
static int board_added(struct slot *p_slot)
{
u8 hp_slot;
u8 slots_not_empty = 0;
int rc = 0;
enum pci_bus_speed asp, bsp, msp;
struct controller *ctrl = p_slot->ctrl;
struct pci_bus *parent = ctrl->pci_dev->subordinate;
hp_slot = p_slot->device - ctrl->slot_device_offset;
ctrl_dbg(ctrl,
"%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n",
__func__, p_slot->device, ctrl->slot_device_offset, hp_slot);
/* Power on slot without connecting to bus */
rc = p_slot->hpc_ops->power_on_slot(p_slot);
if (rc) {
ctrl_err(ctrl, "Failed to power on slot\n");
return -1;
}
if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) {
if (slots_not_empty)
return WRONG_BUS_FREQUENCY;
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
ctrl_err(ctrl, "%s: Issue of set bus speed mode command"
" failed\n", __func__);
return WRONG_BUS_FREQUENCY;
}
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
ctrl_err(ctrl, "Issue of Slot Enable command failed\n");
return rc;
}
}
rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &asp);
if (rc) {
ctrl_err(ctrl, "Can't get adapter speed or "
"bus mode mismatch\n");
return WRONG_BUS_FREQUENCY;
}
bsp = ctrl->pci_dev->bus->cur_bus_speed;
msp = ctrl->pci_dev->bus->max_bus_speed;
/* Check if there are other slots or devices on the same bus */
if (!list_empty(&ctrl->pci_dev->subordinate->devices))
slots_not_empty = 1;
ctrl_dbg(ctrl, "%s: slots_not_empty %d, adapter_speed %d, bus_speed %d,"
" max_bus_speed %d\n", __func__, slots_not_empty, asp,
bsp, msp);
rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, asp, bsp, msp);
if (rc)
return rc;
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
ctrl_err(ctrl, "Issue of Slot Enable command failed\n");
return rc;
}
/* Wait for ~1 second */
msleep(1000);
ctrl_dbg(ctrl, "%s: slot status = %x\n", __func__, p_slot->status);
/* Check for a power fault */
if (p_slot->status == 0xFF) {
/* power fault occurred, but it was benign */
ctrl_dbg(ctrl, "%s: Power fault\n", __func__);
rc = POWER_FAILURE;
p_slot->status = 0;
goto err_exit;
}
if (shpchp_configure_device(p_slot)) {
ctrl_err(ctrl, "Cannot add device at %04x:%02x:%02x\n",
pci_domain_nr(parent), p_slot->bus, p_slot->device);
goto err_exit;
}
p_slot->status = 0;
p_slot->is_a_board = 0x01;
p_slot->pwr_save = 1;
p_slot->hpc_ops->green_led_on(p_slot);
return 0;
err_exit:
/* turn off slot, turn on Amber LED, turn off Green LED */
rc = p_slot->hpc_ops->slot_disable(p_slot);
if (rc) {
ctrl_err(ctrl, "%s: Issue of Slot Disable command failed\n",
__func__);
return rc;
}
return(rc);
}
/**
* remove_board - Turns off slot and LEDs
* @p_slot: target &slot
*/
static int remove_board(struct slot *p_slot)
{
struct controller *ctrl = p_slot->ctrl;
u8 hp_slot;
int rc;
if (shpchp_unconfigure_device(p_slot))
return(1);
hp_slot = p_slot->device - ctrl->slot_device_offset;
p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
ctrl_dbg(ctrl, "%s: hp_slot = %d\n", __func__, hp_slot);
/* Change status to shutdown */
if (p_slot->is_a_board)
p_slot->status = 0x01;
/* turn off slot, turn on Amber LED, turn off Green LED */
rc = p_slot->hpc_ops->slot_disable(p_slot);
if (rc) {
ctrl_err(ctrl, "%s: Issue of Slot Disable command failed\n",
__func__);
return rc;
}
rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
if (rc) {
ctrl_err(ctrl, "Issue of Set Attention command failed\n");
return rc;
}
p_slot->pwr_save = 0;
p_slot->is_a_board = 0;
return 0;
}
struct pushbutton_work_info {
struct slot *p_slot;
struct work_struct work;
};
/**
* shpchp_pushbutton_thread - handle pushbutton events
* @work: &struct work_struct to be handled
*
* Scheduled procedure to handle blocking stuff for the pushbuttons.
* Handles all pending events and exits.
*/
static void shpchp_pushbutton_thread(struct work_struct *work)
{
struct pushbutton_work_info *info =
container_of(work, struct pushbutton_work_info, work);
struct slot *p_slot = info->p_slot;
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case POWEROFF_STATE:
mutex_unlock(&p_slot->lock);
shpchp_disable_slot(p_slot);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
break;
case POWERON_STATE:
mutex_unlock(&p_slot->lock);
if (shpchp_enable_slot(p_slot))
p_slot->hpc_ops->green_led_off(p_slot);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
break;
default:
break;
}
mutex_unlock(&p_slot->lock);
kfree(info);
}
void shpchp_queue_pushbutton_work(struct work_struct *work)
{
struct slot *p_slot = container_of(work, struct slot, work.work);
struct pushbutton_work_info *info;
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
ctrl_err(p_slot->ctrl, "%s: Cannot allocate memory\n",
__func__);
return;
}
info->p_slot = p_slot;
INIT_WORK(&info->work, shpchp_pushbutton_thread);
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case BLINKINGOFF_STATE:
p_slot->state = POWEROFF_STATE;
break;
case BLINKINGON_STATE:
p_slot->state = POWERON_STATE;
break;
default:
kfree(info);
goto out;
}
queue_work(shpchp_wq, &info->work);
out:
mutex_unlock(&p_slot->lock);
}
static int update_slot_info (struct slot *slot)
{
struct hotplug_slot_info *info;
int result;
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
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(slot->hotplug_slot, info);
kfree (info);
return result;
}
/*
* Note: This function must be called with slot->lock held
*/
static void handle_button_press_event(struct slot *p_slot)
{
u8 getstatus;
struct controller *ctrl = p_slot->ctrl;
switch (p_slot->state) {
case STATIC_STATE:
p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (getstatus) {
p_slot->state = BLINKINGOFF_STATE;
ctrl_info(ctrl, "PCI slot #%s - powering off due to "
"button press.\n", slot_name(p_slot));
} else {
p_slot->state = BLINKINGON_STATE;
ctrl_info(ctrl, "PCI slot #%s - powering on due to "
"button press.\n", slot_name(p_slot));
}
/* blink green LED and turn off amber */
p_slot->hpc_ops->green_led_blink(p_slot);
p_slot->hpc_ops->set_attention_status(p_slot, 0);
schedule_delayed_work(&p_slot->work, 5*HZ);
break;
case BLINKINGOFF_STATE:
case BLINKINGON_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
*/
ctrl_info(ctrl, "Button cancel on Slot(%s)\n",
slot_name(p_slot));
cancel_delayed_work(&p_slot->work);
if (p_slot->state == BLINKINGOFF_STATE)
p_slot->hpc_ops->green_led_on(p_slot);
else
p_slot->hpc_ops->green_led_off(p_slot);
p_slot->hpc_ops->set_attention_status(p_slot, 0);
ctrl_info(ctrl, "PCI slot #%s - action canceled due to "
"button press\n", slot_name(p_slot));
p_slot->state = STATIC_STATE;
break;
case POWEROFF_STATE:
case POWERON_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
*/
ctrl_info(ctrl, "Button ignore on Slot(%s)\n",
slot_name(p_slot));
update_slot_info(p_slot);
break;
default:
ctrl_warn(ctrl, "Not a valid state\n");
break;
}
}
static void interrupt_event_handler(struct work_struct *work)
{
struct event_info *info = container_of(work, struct event_info, work);
struct slot *p_slot = info->p_slot;
mutex_lock(&p_slot->lock);
switch (info->event_type) {
case INT_BUTTON_PRESS:
handle_button_press_event(p_slot);
break;
case INT_POWER_FAULT:
ctrl_dbg(p_slot->ctrl, "%s: Power fault\n", __func__);
p_slot->hpc_ops->set_attention_status(p_slot, 1);
p_slot->hpc_ops->green_led_off(p_slot);
break;
default:
update_slot_info(p_slot);
break;
}
mutex_unlock(&p_slot->lock);
kfree(info);
}
static int shpchp_enable_slot (struct slot *p_slot)
{
u8 getstatus = 0;
int rc, retval = -ENODEV;
struct controller *ctrl = p_slot->ctrl;
/* 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) {
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
goto out;
}
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (rc || getstatus) {
ctrl_info(ctrl, "Latch open on slot(%s)\n", slot_name(p_slot));
goto out;
}
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (rc || getstatus) {
ctrl_info(ctrl, "Already enabled on slot(%s)\n",
slot_name(p_slot));
goto out;
}
p_slot->is_a_board = 1;
/* We have to save the presence info for these slots */
p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save));
ctrl_dbg(ctrl, "%s: p_slot->pwr_save %x\n", __func__, p_slot->pwr_save);
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if(((p_slot->ctrl->pci_dev->vendor == PCI_VENDOR_ID_AMD) ||
(p_slot->ctrl->pci_dev->device == PCI_DEVICE_ID_AMD_POGO_7458))
&& p_slot->ctrl->num_slots == 1) {
/* handle amd pogo errata; this must be done before enable */
amd_pogo_errata_save_misc_reg(p_slot);
retval = board_added(p_slot);
/* handle amd pogo errata; this must be done after enable */
amd_pogo_errata_restore_misc_reg(p_slot);
} else
retval = board_added(p_slot);
if (retval) {
p_slot->hpc_ops->get_adapter_status(p_slot,
&(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
}
update_slot_info(p_slot);
out:
mutex_unlock(&p_slot->ctrl->crit_sect);
return retval;
}
static int shpchp_disable_slot (struct slot *p_slot)
{
u8 getstatus = 0;
int rc, retval = -ENODEV;
struct controller *ctrl = p_slot->ctrl;
if (!p_slot->ctrl)
return -ENODEV;
/* Check to see if (latch closed, card present, power on) */
mutex_lock(&p_slot->ctrl->crit_sect);
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (rc || !getstatus) {
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
goto out;
}
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (rc || getstatus) {
ctrl_info(ctrl, "Latch open on slot(%s)\n", slot_name(p_slot));
goto out;
}
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (rc || !getstatus) {
ctrl_info(ctrl, "Already disabled on slot(%s)\n",
slot_name(p_slot));
goto out;
}
retval = remove_board(p_slot);
update_slot_info(p_slot);
out:
mutex_unlock(&p_slot->ctrl->crit_sect);
return retval;
}
int shpchp_sysfs_enable_slot(struct slot *p_slot)
{
int retval = -ENODEV;
struct controller *ctrl = p_slot->ctrl;
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case BLINKINGON_STATE:
cancel_delayed_work(&p_slot->work);
case STATIC_STATE:
p_slot->state = POWERON_STATE;
mutex_unlock(&p_slot->lock);
retval = shpchp_enable_slot(p_slot);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
break;
case POWERON_STATE:
ctrl_info(ctrl, "Slot %s is already in powering on state\n",
slot_name(p_slot));
break;
case BLINKINGOFF_STATE:
case POWEROFF_STATE:
ctrl_info(ctrl, "Already enabled on slot %s\n",
slot_name(p_slot));
break;
default:
ctrl_err(ctrl, "Not a valid state on slot %s\n",
slot_name(p_slot));
break;
}
mutex_unlock(&p_slot->lock);
return retval;
}
int shpchp_sysfs_disable_slot(struct slot *p_slot)
{
int retval = -ENODEV;
struct controller *ctrl = p_slot->ctrl;
mutex_lock(&p_slot->lock);
switch (p_slot->state) {
case BLINKINGOFF_STATE:
cancel_delayed_work(&p_slot->work);
case STATIC_STATE:
p_slot->state = POWEROFF_STATE;
mutex_unlock(&p_slot->lock);
retval = shpchp_disable_slot(p_slot);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
break;
case POWEROFF_STATE:
ctrl_info(ctrl, "Slot %s is already in powering off state\n",
slot_name(p_slot));
break;
case BLINKINGON_STATE:
case POWERON_STATE:
ctrl_info(ctrl, "Already disabled on slot %s\n",
slot_name(p_slot));
break;
default:
ctrl_err(ctrl, "Not a valid state on slot %s\n",
slot_name(p_slot));
break;
}
mutex_unlock(&p_slot->lock);
return retval;
}