These functions:
pcie_enable_notification()
pciehp_power_off_slot()
pciehp_get_power_status()
pciehp_get_attention_status()
pciehp_set_attention_status()
pciehp_get_latch_status()
pciehp_get_adapter_status()
pcie_write_cmd()
now always return success, so this patch makes them void and drops the
error-checking code in their callers.
No functional change.
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
---
drivers/pci/hotplug/pciehp.h | 14 +++++----
drivers/pci/hotplug/pciehp_core.c | 15 +++++++---
drivers/pci/hotplug/pciehp_ctrl.c | 52 +++++++++++++---------------------
drivers/pci/hotplug/pciehp_hpc.c | 56 +++++++++++--------------------------
drivers/pci/hotplug/pciehp_pci.c | 6 +---
5 files changed, 54 insertions(+), 89 deletions(-)
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 21e865ded1dc..ffe6a6b336cf 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -140,15 +140,15 @@ struct controller *pcie_init(struct pcie_device *dev);
int pcie_init_notification(struct controller *ctrl);
int pciehp_enable_slot(struct slot *p_slot);
int pciehp_disable_slot(struct slot *p_slot);
-int pcie_enable_notification(struct controller *ctrl);
+void pcie_enable_notification(struct controller *ctrl);
int pciehp_power_on_slot(struct slot *slot);
-int pciehp_power_off_slot(struct slot *slot);
-int pciehp_get_power_status(struct slot *slot, u8 *status);
-int pciehp_get_attention_status(struct slot *slot, u8 *status);
+void pciehp_power_off_slot(struct slot *slot);
+void pciehp_get_power_status(struct slot *slot, u8 *status);
+void pciehp_get_attention_status(struct slot *slot, u8 *status);
-int pciehp_set_attention_status(struct slot *slot, u8 status);
-int pciehp_get_latch_status(struct slot *slot, u8 *status);
-int pciehp_get_adapter_status(struct slot *slot, u8 *status);
+void pciehp_set_attention_status(struct slot *slot, u8 status);
+void pciehp_get_latch_status(struct slot *slot, u8 *status);
+void pciehp_get_adapter_status(struct slot *slot, u8 *status);
int pciehp_query_power_fault(struct slot *slot);
void pciehp_green_led_on(struct slot *slot);
void pciehp_green_led_off(struct slot *slot);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index bbd48bbe4e9b..143a389d81fa 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -160,7 +160,8 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_set_attention_status(slot, status);
+ pciehp_set_attention_status(slot, status);
+ return 0;
}
@@ -192,7 +193,8 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_power_status(slot, value);
+ pciehp_get_power_status(slot, value);
+ return 0;
}
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -202,7 +204,8 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_attention_status(slot, value);
+ pciehp_get_attention_status(slot, value);
+ return 0;
}
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -212,7 +215,8 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_latch_status(slot, value);
+ pciehp_get_latch_status(slot, value);
+ return 0;
}
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -222,7 +226,8 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_adapter_status(slot, value);
+ pciehp_get_adapter_status(slot, value);
+ return 0;
}
static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 38f018679175..6c730b161b33 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -158,11 +158,8 @@ static void set_slot_off(struct controller *ctrl, struct slot * pslot)
{
/* turn off slot, turn on Amber LED, turn off Green LED if supported*/
if (POWER_CTRL(ctrl)) {
- if (pciehp_power_off_slot(pslot)) {
- ctrl_err(ctrl,
- "Issue of Slot Power Off command failed\n");
- return;
- }
+ pciehp_power_off_slot(pslot);
+
/*
* After turning power off, we must wait for at least 1 second
* before taking any action that relies on power having been
@@ -174,13 +171,8 @@ static void set_slot_off(struct controller *ctrl, struct slot * pslot)
if (PWR_LED(ctrl))
pciehp_green_led_off(pslot);
- if (ATTN_LED(ctrl)) {
- if (pciehp_set_attention_status(pslot, 1)) {
- ctrl_err(ctrl,
- "Issue of Set Attention Led command failed\n");
- return;
- }
- }
+ if (ATTN_LED(ctrl))
+ pciehp_set_attention_status(pslot, 1);
}
/**
@@ -243,7 +235,7 @@ err_exit:
*/
static int remove_board(struct slot *p_slot)
{
- int retval = 0;
+ int retval;
struct controller *ctrl = p_slot->ctrl;
retval = pciehp_unconfigure_device(p_slot);
@@ -251,13 +243,8 @@ static int remove_board(struct slot *p_slot)
return retval;
if (POWER_CTRL(ctrl)) {
- /* power off slot */
- retval = pciehp_power_off_slot(p_slot);
- if (retval) {
- ctrl_err(ctrl,
- "Issue of Slot Disable command failed\n");
- return retval;
- }
+ pciehp_power_off_slot(p_slot);
+
/*
* After turning power off, we must wait for at least 1 second
* before taking any action that relies on power having been
@@ -482,14 +469,14 @@ int pciehp_enable_slot(struct slot *p_slot)
int rc;
struct controller *ctrl = p_slot->ctrl;
- rc = pciehp_get_adapter_status(p_slot, &getstatus);
- if (rc || !getstatus) {
+ pciehp_get_adapter_status(p_slot, &getstatus);
+ if (!getstatus) {
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
return -ENODEV;
}
if (MRL_SENS(p_slot->ctrl)) {
- rc = pciehp_get_latch_status(p_slot, &getstatus);
- if (rc || getstatus) {
+ pciehp_get_latch_status(p_slot, &getstatus);
+ if (getstatus) {
ctrl_info(ctrl, "Latch open on slot(%s)\n",
slot_name(p_slot));
return -ENODEV;
@@ -497,8 +484,8 @@ int pciehp_enable_slot(struct slot *p_slot)
}
if (POWER_CTRL(p_slot->ctrl)) {
- rc = pciehp_get_power_status(p_slot, &getstatus);
- if (rc || getstatus) {
+ pciehp_get_power_status(p_slot, &getstatus);
+ if (getstatus) {
ctrl_info(ctrl, "Already enabled on slot(%s)\n",
slot_name(p_slot));
return -EINVAL;
@@ -518,15 +505,14 @@ int pciehp_enable_slot(struct slot *p_slot)
int pciehp_disable_slot(struct slot *p_slot)
{
u8 getstatus = 0;
- int ret = 0;
struct controller *ctrl = p_slot->ctrl;
if (!p_slot->ctrl)
return 1;
if (!HP_SUPR_RM(p_slot->ctrl)) {
- ret = pciehp_get_adapter_status(p_slot, &getstatus);
- if (ret || !getstatus) {
+ pciehp_get_adapter_status(p_slot, &getstatus);
+ if (!getstatus) {
ctrl_info(ctrl, "No adapter on slot(%s)\n",
slot_name(p_slot));
return -ENODEV;
@@ -534,8 +520,8 @@ int pciehp_disable_slot(struct slot *p_slot)
}
if (MRL_SENS(p_slot->ctrl)) {
- ret = pciehp_get_latch_status(p_slot, &getstatus);
- if (ret || getstatus) {
+ pciehp_get_latch_status(p_slot, &getstatus);
+ if (getstatus) {
ctrl_info(ctrl, "Latch open on slot(%s)\n",
slot_name(p_slot));
return -ENODEV;
@@ -543,8 +529,8 @@ int pciehp_disable_slot(struct slot *p_slot)
}
if (POWER_CTRL(p_slot->ctrl)) {
- ret = pciehp_get_power_status(p_slot, &getstatus);
- if (ret || !getstatus) {
+ pciehp_get_power_status(p_slot, &getstatus);
+ if (!getstatus) {
ctrl_info(ctrl, "Already disabled on slot(%s)\n",
slot_name(p_slot));
return -EINVAL;
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 6afdd2358227..83df74910f9a 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -153,7 +153,7 @@ static void pcie_wait_cmd(struct controller *ctrl, int poll)
* @cmd: command value written to slot control register
* @mask: bitmask of slot control register to be modified
*/
-static int pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
+static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
{
struct pci_dev *pdev = ctrl_dev(ctrl);
u16 slot_status;
@@ -208,7 +208,6 @@ static int pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
pcie_wait_cmd(ctrl, poll);
}
mutex_unlock(&ctrl->ctrl_lock);
- return 0;
}
static bool check_link_active(struct controller *ctrl)
@@ -342,7 +341,7 @@ static int pciehp_link_disable(struct controller *ctrl)
return __pciehp_link_set(ctrl, false);
}
-int pciehp_get_attention_status(struct slot *slot, u8 *status)
+void pciehp_get_attention_status(struct slot *slot, u8 *status)
{
struct controller *ctrl = slot->ctrl;
struct pci_dev *pdev = ctrl_dev(ctrl);
@@ -372,11 +371,9 @@ int pciehp_get_attention_status(struct slot *slot, u8 *status)
*status = 0xFF;
break;
}
-
- return 0;
}
-int pciehp_get_power_status(struct slot *slot, u8 *status)
+void pciehp_get_power_status(struct slot *slot, u8 *status)
{
struct controller *ctrl = slot->ctrl;
struct pci_dev *pdev = ctrl_dev(ctrl);
@@ -400,28 +397,24 @@ int pciehp_get_power_status(struct slot *slot, u8 *status)
*status = 0xFF;
break;
}
-
- return 0;
}
-int pciehp_get_latch_status(struct slot *slot, u8 *status)
+void pciehp_get_latch_status(struct slot *slot, u8 *status)
{
struct pci_dev *pdev = ctrl_dev(slot->ctrl);
u16 slot_status;
pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status);
*status = !!(slot_status & PCI_EXP_SLTSTA_MRLSS);
- return 0;
}
-int pciehp_get_adapter_status(struct slot *slot, u8 *status)
+void pciehp_get_adapter_status(struct slot *slot, u8 *status)
{
struct pci_dev *pdev = ctrl_dev(slot->ctrl);
u16 slot_status;
pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status);
*status = !!(slot_status & PCI_EXP_SLTSTA_PDS);
- return 0;
}
int pciehp_query_power_fault(struct slot *slot)
@@ -433,7 +426,7 @@ int pciehp_query_power_fault(struct slot *slot)
return !!(slot_status & PCI_EXP_SLTSTA_PFD);
}
-int pciehp_set_attention_status(struct slot *slot, u8 value)
+void pciehp_set_attention_status(struct slot *slot, u8 value)
{
struct controller *ctrl = slot->ctrl;
u16 slot_cmd;
@@ -451,11 +444,11 @@ int pciehp_set_attention_status(struct slot *slot, u8 value)
slot_cmd = 0x0080;
break;
default:
- return -EINVAL;
+ return;
}
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
- return pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
+ pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
}
void pciehp_green_led_on(struct slot *slot)
@@ -515,11 +508,7 @@ int pciehp_power_on_slot(struct slot * slot)
slot_cmd = POWER_ON;
cmd_mask = PCI_EXP_SLTCTL_PCC;
- retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
- if (retval) {
- ctrl_err(ctrl, "Write %x command failed!\n", slot_cmd);
- return retval;
- }
+ pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
@@ -530,12 +519,11 @@ int pciehp_power_on_slot(struct slot * slot)
return retval;
}
-int pciehp_power_off_slot(struct slot * slot)
+void pciehp_power_off_slot(struct slot * slot)
{
struct controller *ctrl = slot->ctrl;
u16 slot_cmd;
u16 cmd_mask;
- int retval;
/* Disable the link at first */
pciehp_link_disable(ctrl);
@@ -547,14 +535,9 @@ int pciehp_power_off_slot(struct slot * slot)
slot_cmd = POWER_OFF;
cmd_mask = PCI_EXP_SLTCTL_PCC;
- retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
- if (retval) {
- ctrl_err(ctrl, "Write command failed!\n");
- return retval;
- }
+ pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
- return 0;
}
static irqreturn_t pcie_isr(int irq, void *dev_id)
@@ -617,7 +600,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
-int pcie_enable_notification(struct controller *ctrl)
+void pcie_enable_notification(struct controller *ctrl)
{
u16 cmd, mask;
@@ -643,22 +626,18 @@ int pcie_enable_notification(struct controller *ctrl)
PCI_EXP_SLTCTL_MRLSCE | PCI_EXP_SLTCTL_PFDE |
PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE);
- if (pcie_write_cmd(ctrl, cmd, mask)) {
- ctrl_err(ctrl, "Cannot enable software notification\n");
- return -1;
- }
- return 0;
+ pcie_write_cmd(ctrl, cmd, mask);
}
static void pcie_disable_notification(struct controller *ctrl)
{
u16 mask;
+
mask = (PCI_EXP_SLTCTL_PDCE | PCI_EXP_SLTCTL_ABPE |
PCI_EXP_SLTCTL_MRLSCE | PCI_EXP_SLTCTL_PFDE |
PCI_EXP_SLTCTL_HPIE | PCI_EXP_SLTCTL_CCIE |
PCI_EXP_SLTCTL_DLLSCE);
- if (pcie_write_cmd(ctrl, 0, mask))
- ctrl_warn(ctrl, "Cannot disable software notification\n");
+ pcie_write_cmd(ctrl, 0, mask);
}
/*
@@ -698,10 +677,7 @@ int pcie_init_notification(struct controller *ctrl)
{
if (pciehp_request_irq(ctrl))
return -1;
- if (pcie_enable_notification(ctrl)) {
- pciehp_free_irq(ctrl);
- return -1;
- }
+ pcie_enable_notification(ctrl);
ctrl->notification_enabled = 1;
return 0;
}
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index 0e0d0f7f63fd..198355112ee7 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -78,7 +78,7 @@ int pciehp_configure_device(struct slot *p_slot)
int pciehp_unconfigure_device(struct slot *p_slot)
{
- int ret, rc = 0;
+ int rc = 0;
u8 bctl = 0;
u8 presence = 0;
struct pci_dev *dev, *temp;
@@ -88,9 +88,7 @@ int pciehp_unconfigure_device(struct slot *p_slot)
ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n",
__func__, pci_domain_nr(parent), parent->number);
- ret = pciehp_get_adapter_status(p_slot, &presence);
- if (ret)
- presence = 0;
+ pciehp_get_adapter_status(p_slot, &presence);
/*
* Stopping an SR-IOV PF device removes all the associated VFs,
--
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