From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Date: Mon, 23 Mar 2020 17:26:08 -0700
Subject: PCI/AER: Rationalize error status register clearing
Git-commit: 894020fdd88c1e9a74c60b67c0f19f1c7696ba2f
Patch-mainline: v5.7-rc1
References: bsc#1169263, jsc#SLE-10700, jsc#SLE-9457, jsc#SLE-12300
The AER interfaces to clear error status registers were a confusing mess:
- pci_cleanup_aer_uncorrect_error_status() cleared non-fatal errors
from the Uncorrectable Error Status register.
- pci_aer_clear_fatal_status() cleared fatal errors from the
Uncorrectable Error Status register.
- pci_cleanup_aer_error_status_regs() cleared the Root Error Status
register (for Root Ports), the Uncorrectable Error Status register,
and the Correctable Error Status register.
Rename them to make them consistent:
From To
---------------------------------------- -------------------------------
pci_cleanup_aer_uncorrect_error_status() pci_aer_clear_nonfatal_status()
pci_aer_clear_fatal_status() pci_aer_clear_fatal_status()
pci_cleanup_aer_error_status_regs() pci_aer_clear_status()
Since pci_cleanup_aer_error_status_regs() (renamed to
pci_aer_clear_status()) is only used within drivers/pci/, move the
declaration from <linux/aer.h> to drivers/pci/pci.h.
[bhelgaas: commit log, add renames]
Link: https://lore.kernel.org/r/d1310a75dc3d28f7e8da4e99c45fbd3e60fe238e.1585000084.git.sathyanarayanan.kuppuswamy@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
Documentation/PCI/pcieaer-howto.rst | 4 ++--
drivers/net/ethernet/intel/ice/ice_main.c | 4 ++--
drivers/ntb/hw/idt/ntb_hw_idt.c | 4 ++--
drivers/pci/pci.c | 2 +-
drivers/pci/pci.h | 2 ++
drivers/pci/pcie/aer.c | 8 ++++----
drivers/pci/pcie/dpc.c | 2 +-
drivers/pci/pcie/err.c | 2 +-
drivers/scsi/lpfc/lpfc_attr.c | 4 ++--
include/linux/aer.h | 9 ++-------
10 files changed, 19 insertions(+), 22 deletions(-)
--- a/Documentation/PCI/pcieaer-howto.rst
+++ b/Documentation/PCI/pcieaer-howto.rst
@@ -232,9 +232,9 @@ messages to root port when an error is d
::
- int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);`
+ int pci_aer_clear_nonfatal_status(struct pci_dev *dev);`
-pci_cleanup_aer_uncorrect_error_status cleanups the uncorrectable
+pci_aer_clear_nonfatal_status clears non-fatal errors in the uncorrectable
error status register.
Frequent Asked Questions
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3458,9 +3458,10 @@ static pci_ers_result_t ice_pci_err_slot
result = PCI_ERS_RESULT_DISCONNECT;
}
- err = pci_cleanup_aer_uncorrect_error_status(pdev);
+ err = pci_aer_clear_nonfatal_status(pdev);
if (err)
- dev_dbg(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status failed, error %d\n",
+ dev_dbg(&pdev->dev,
+ "pci_aer_clear_nonfatal_status() failed, error %d\n",
err);
/* non-fatal, continue */
--- a/drivers/ntb/hw/idt/ntb_hw_idt.c
+++ b/drivers/ntb/hw/idt/ntb_hw_idt.c
@@ -2674,8 +2674,8 @@ static int idt_init_pci(struct idt_ntb_d
ret = pci_enable_pcie_error_reporting(pdev);
if (ret != 0)
dev_warn(&pdev->dev, "PCIe AER capability disabled\n");
- else /* Cleanup uncorrectable error status before getting to init */
- pci_cleanup_aer_uncorrect_error_status(pdev);
+ else /* Cleanup nonfatal error status before getting to init */
+ pci_aer_clear_nonfatal_status(pdev);
/* First enable the PCI device */
ret = pcim_enable_device(pdev);
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1471,7 +1471,7 @@ void pci_restore_state(struct pci_dev *d
pci_restore_rebar_state(dev);
pci_restore_dpc_state(dev);
- pci_cleanup_aer_error_status_regs(dev);
+ pci_aer_clear_status(dev);
pci_restore_config_space(dev);
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -611,6 +611,7 @@ void pci_aer_exit(struct pci_dev *dev);
extern const struct attribute_group aer_stats_attr_group;
void pci_aer_clear_fatal_status(struct pci_dev *dev);
void pci_aer_clear_device_status(struct pci_dev *dev);
+int pci_aer_clear_status(struct pci_dev *dev);
int pci_aer_raw_clear_status(struct pci_dev *dev);
#else
static inline void pci_no_aer(void) { }
@@ -618,6 +619,7 @@ static inline void pci_aer_init(struct p
static inline void pci_aer_exit(struct pci_dev *d) { }
static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
static inline void pci_aer_clear_device_status(struct pci_dev *dev) { }
+static inline int pci_aer_clear_status(struct pci_dev *dev) { return -EINVAL; }
static inline int pci_aer_raw_clear_status(struct pci_dev *dev) { return -EINVAL; }
#endif
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -375,7 +375,7 @@ void pci_aer_clear_device_status(struct
pcie_capability_write_word(dev, PCI_EXP_DEVSTA, sta);
}
-int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
+int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
{
int pos;
u32 status, sev;
@@ -396,7 +396,7 @@ int pci_cleanup_aer_uncorrect_error_stat
return 0;
}
-EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
+EXPORT_SYMBOL_GPL(pci_aer_clear_nonfatal_status);
void pci_aer_clear_fatal_status(struct pci_dev *dev)
{
@@ -455,7 +455,7 @@ int pci_aer_raw_clear_status(struct pci_
return 0;
}
-int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
+int pci_aer_clear_status(struct pci_dev *dev)
{
if (pcie_aer_get_firmware_first(dev))
return -EIO;
@@ -470,7 +470,7 @@ void pci_aer_init(struct pci_dev *dev)
if (dev->aer_cap)
dev->aer_stats = kzalloc(sizeof(struct aer_stats), GFP_KERNEL);
- pci_cleanup_aer_error_status_regs(dev);
+ pci_aer_clear_status(dev);
}
void pci_aer_exit(struct pci_dev *dev)
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -221,7 +221,7 @@ void dpc_process_error(struct pci_dev *p
dpc_get_aer_uncorrect_severity(pdev, &info) &&
aer_get_device_error_info(pdev, &info)) {
aer_print_error(pdev, &info);
- pci_cleanup_aer_uncorrect_error_status(pdev);
+ pci_aer_clear_nonfatal_status(pdev);
pci_aer_clear_fatal_status(pdev);
}
}
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -194,7 +194,7 @@ pci_ers_result_t pcie_do_recovery(struct
pci_walk_bus(bus, report_resume, &status);
pci_aer_clear_device_status(dev);
- pci_cleanup_aer_uncorrect_error_status(dev);
+ pci_aer_clear_nonfatal_status(dev);
pci_info(dev, "AER: Device recovery successful\n");
return status;
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -4780,7 +4780,7 @@ static DEVICE_ATTR_RW(lpfc_aer_support);
* Description:
* If the @buf contains 1 and the device currently has the AER support
* enabled, then invokes the kernel AER helper routine
- * pci_cleanup_aer_uncorrect_error_status to clean up the uncorrectable
+ * pci_aer_clear_nonfatal_status() to clean up the uncorrectable
* error status register.
*
* Notes:
@@ -4806,7 +4806,7 @@ lpfc_aer_cleanup_state(struct device *de
return -EINVAL;
if (phba->hba_flag & HBA_AER_ENABLED)
- rc = pci_cleanup_aer_uncorrect_error_status(phba->pcidev);
+ rc = pci_aer_clear_nonfatal_status(phba->pcidev);
if (rc == 0)
return strlen(buf);
--- a/include/linux/aer.h
+++ b/include/linux/aer.h
@@ -44,8 +44,7 @@ struct aer_capability_regs {
/* PCIe port driver needs this function to enable AER */
int pci_enable_pcie_error_reporting(struct pci_dev *dev);
int pci_disable_pcie_error_reporting(struct pci_dev *dev);
-int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
-int pci_cleanup_aer_error_status_regs(struct pci_dev *dev);
+int pci_aer_clear_nonfatal_status(struct pci_dev *dev);
#else
static inline int pci_enable_pcie_error_reporting(struct pci_dev *dev)
{
@@ -55,11 +54,7 @@ static inline int pci_disable_pcie_error
{
return -EINVAL;
}
-static inline int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
-{
- return -EINVAL;
-}
-static inline int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
+static inline int pci_aer_clear_nonfatal_status(struct pci_dev *dev)
{
return -EINVAL;
}