Merge tag 'cxl-fixes-6.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

Pull cxl fixes from Dave Jiang:
 "Check for RCH dport before accessing pci_host_bridge and a fix to
  address a KASAN warning for the cxl regression test suite cxl-test"

* tag 'cxl-fixes-6.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
  cxl/test: Skip cxl_setup_parent_dport() for emulated dports
  cxl/pci: Get AER capability address from RCRB only for RCH dport

Author: torvalds

drivers/cxl/core/pci.c

@@ -834,11 +834,13 @@ static void cxl_disable_rch_root_ints(struct cxl_dport *dport)
 void cxl_setup_parent_dport(struct device *host, struct cxl_dport *dport)
 {
 	struct device *dport_dev = dport->dport_dev;
-	struct pci_host_bridge *host_bridge;
 
-	host_bridge = to_pci_host_bridge(dport_dev);
-	if (host_bridge->native_aer)
-		dport->rcrb.aer_cap = cxl_rcrb_to_aer(dport_dev, dport->rcrb.base);
+	if (dport->rch) {
+		struct pci_host_bridge *host_bridge = to_pci_host_bridge(dport_dev);
+
+		if (host_bridge->native_aer)
+			dport->rcrb.aer_cap = cxl_rcrb_to_aer(dport_dev, dport->rcrb.base);
+	}
 
 	dport->reg_map.host = host;
 	cxl_dport_map_regs(dport);

tools/testing/cxl/Kbuild

@@ -14,6 +14,7 @@ ldflags-y += --wrap=cxl_dvsec_rr_decode
 ldflags-y += --wrap=devm_cxl_add_rch_dport
 ldflags-y += --wrap=cxl_rcd_component_reg_phys
 ldflags-y += --wrap=cxl_endpoint_parse_cdat
+ldflags-y += --wrap=cxl_setup_parent_dport
 
 DRIVERS := ../../../drivers
 CXL_SRC := $(DRIVERS)/cxl

tools/testing/cxl/test/mock.c

@@ -299,6 +299,18 @@ void __wrap_cxl_endpoint_parse_cdat(struct cxl_port *port)
 }
 EXPORT_SYMBOL_NS_GPL(__wrap_cxl_endpoint_parse_cdat, CXL);
 
+void __wrap_cxl_setup_parent_dport(struct device *host, struct cxl_dport *dport)
+{
+	int index;
+	struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
+
+	if (!ops || !ops->is_mock_port(dport->dport_dev))
+		cxl_setup_parent_dport(host, dport);
+
+	put_cxl_mock_ops(index);
+}
+EXPORT_SYMBOL_NS_GPL(__wrap_cxl_setup_parent_dport, CXL);
+
 MODULE_LICENSE("GPL v2");
 MODULE_IMPORT_NS(ACPI);
 MODULE_IMPORT_NS(CXL);