summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/hotplug/shpchp_ctrl.c66
1 files changed, 24 insertions, 42 deletions
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 802c4c48d186..1a7003d4ba96 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -307,15 +307,10 @@ static int board_added(struct slot *p_slot)
__FUNCTION__, p_slot->device,
ctrl->slot_device_offset, hp_slot);
- /* Wait for exclusive access to hardware */
- mutex_lock(&ctrl->crit_sect);
-
/* Power on slot without connecting to bus */
rc = p_slot->hpc_ops->power_on_slot(p_slot);
if (rc) {
err("%s: Failed to power on slot\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
return -1;
}
@@ -325,14 +320,12 @@ static int board_added(struct slot *p_slot)
if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) {
err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
- mutex_unlock(&ctrl->crit_sect);
return WRONG_BUS_FREQUENCY;
}
/* turn on board, blink green LED, turn off Amber LED */
if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) {
err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
- mutex_unlock(&ctrl->crit_sect);
return rc;
}
}
@@ -346,16 +339,12 @@ static int board_added(struct slot *p_slot)
if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
return WRONG_BUS_FREQUENCY;
}
rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
err("%s: Can't get bus operation speed\n", __FUNCTION__);
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
return WRONG_BUS_FREQUENCY;
}
@@ -365,9 +354,6 @@ static int board_added(struct slot *p_slot)
max_bus_speed = bus_speed;
}
- /* Done with exclusive hardware access */
- mutex_unlock(&ctrl->crit_sect);
-
if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) {
err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
pi = 1;
@@ -744,29 +730,25 @@ static void interrupt_event_handler(struct controller *ctrl)
int shpchp_enable_slot (struct slot *p_slot)
{
u8 getstatus = 0;
- int rc;
+ int rc, retval = -ENODEV;
/* 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 -ENODEV;
+ goto out;
}
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 -ENODEV;
+ goto out;
}
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 -ENODEV;
+ goto out;
}
- mutex_unlock(&p_slot->ctrl->crit_sect);
p_slot->is_a_board = 1;
@@ -781,27 +763,29 @@ int shpchp_enable_slot (struct slot *p_slot)
&& p_slot->ctrl->num_slots == 1) {
/* handle amd pogo errata; this must be done before enable */
amd_pogo_errata_save_misc_reg(p_slot);
- rc = board_added(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
- rc = board_added(p_slot);
+ retval = board_added(p_slot);
- if (rc) {
+ 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);
- return rc;
+ out:
+ mutex_unlock(&p_slot->ctrl->crit_sect);
+ return retval;
}
int shpchp_disable_slot (struct slot *p_slot)
{
u8 getstatus = 0;
- int ret = 0;
+ int rc, retval = -ENODEV;
if (!p_slot->ctrl)
return -ENODEV;
@@ -809,28 +793,26 @@ int shpchp_disable_slot (struct slot *p_slot)
/* Check to see if (latch closed, card present, power on) */
mutex_lock(&p_slot->ctrl->crit_sect);
- ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
- if (ret || !getstatus) {
+ 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 -ENODEV;
+ goto out;
}
- ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
- if (ret || getstatus) {
+ 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 -ENODEV;
+ goto out;
}
- ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
- if (ret || !getstatus) {
+ rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
+ if (rc || !getstatus) {
info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
- mutex_unlock(&p_slot->ctrl->crit_sect);
- return -ENODEV;
+ goto out;
}
- mutex_unlock(&p_slot->ctrl->crit_sect);
- ret = remove_board(p_slot);
+ retval = remove_board(p_slot);
update_slot_info(p_slot);
- return ret;
+ out:
+ mutex_unlock(&p_slot->ctrl->crit_sect);
+ return retval;
}
OpenPOWER on IntegriCloud