aerdrv: Move cper_print_aer() call out of interrupt context

The following warning was seen on 3.9 when a corrected PCIe error was being
handled by the AER subsystem.

WARNING: at .../drivers/pci/search.c:214 pci_get_dev_by_id+0x8a/0x90()

This occurred because a call to pci_get_domain_bus_and_slot() was added to
cper_print_pcie() to setup for the call to cper_print_aer().  The warning
showed up because cper_print_pcie() is called in an interrupt context and
pci_get* functions are not supposed to be called in that context.

The solution is to move the cper_print_aer() call out of the interrupt
context and into aer_recover_work_func() to avoid any warnings when calling
pci_get* functions.

Signed-off-by: Lance Ortiz <lance.ortiz@hp.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 0 insertions, 18 deletions

diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
index fefc2ca7cc3e..33dc6a004802 100644
--- a/drivers/acpi/apei/cper.c
+++ b/drivers/acpi/apei/cper.c
@@ -250,10 +250,6 @@ static const char *cper_pcie_port_type_strs[] = {
 static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
                             const struct acpi_hest_generic_data *gdata)
 {
-#ifdef CONFIG_ACPI_APEI_PCIEAER
-        struct pci_dev *dev;
-#endif
-
         if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
                 printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
                        pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
@@ -285,20 +281,6 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
                 printk(
         "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
         pfx, pcie->bridge.secondary_status, pcie->bridge.control);
-#ifdef CONFIG_ACPI_APEI_PCIEAER
-        dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
-                        pcie->device_id.bus, pcie->device_id.function);
-        if (!dev) {
-                pr_err("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
-                        pcie->device_id.segment, pcie->device_id.bus,
-                        pcie->device_id.slot, pcie->device_id.function);
-                return;
-        }
-        if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO)
-                cper_print_aer(pfx, dev, gdata->error_severity,
-                                (struct aer_capability_regs *) pcie->aer_info);
-        pci_dev_put(dev);
-#endif
 }
 
 static const char *apei_estatus_section_flag_strs[] = {