diff mbox series

[06/11] cxl/acpi: Add a lock class for the root platform device

Message ID 164610296214.2682974.9364719321216244746.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive)
State New, archived
Headers show
Series device-core: Generic device-lock lockdep validation | expand

Commit Message

Dan Williams March 1, 2022, 2:49 a.m. UTC 
Now that the device-core can start validating lockdep usage after the
device has been added, use that capability to validate usage of
device_lock() against the ACPI0017 device relative to other subsystem
locks.

Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/cxl/acpi.c |    1 +
 drivers/cxl/cxl.h  |    3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
index 37bc8d787999..7fa7bf6088cd 100644
--- a/drivers/cxl/acpi.c
+++ b/drivers/cxl/acpi.c
@@ -313,6 +313,7 @@  static int cxl_acpi_probe(struct platform_device *pdev)
 	struct acpi_device *adev = ACPI_COMPANION(host);
 	struct cxl_cfmws_context ctx;
 
+	device_set_lock_class(&pdev->dev, CXL_ROOT_LOCK);
 	root_port = devm_cxl_add_port(host, host, CXL_RESOURCE_NONE, NULL);
 	if (IS_ERR(root_port))
 		return PTR_ERR(root_port);
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index f94eff659cce..5179b6bb1b36 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -496,9 +496,9 @@  struct cxl_nvdimm *cxl_find_nvdimm(struct cxl_memdev *cxlmd);
 #define __mock static
 #endif
 
-#ifdef CONFIG_PROVE_CXL_LOCKING
 enum cxl_lock_class {
 	CXL_ANON_LOCK,
+	CXL_ROOT_LOCK,
 	CXL_NVDIMM_LOCK,
 	CXL_NVDIMM_BRIDGE_LOCK,
 	CXL_PORT_LOCK = 2,
@@ -510,6 +510,7 @@  enum cxl_lock_class {
 	 */
 };
 
+#ifdef CONFIG_PROVE_CXL_LOCKING
 static inline int clamp_lock_class(struct device *dev, int lock_class)
 {
 	if (lock_class >= MAX_LOCKDEP_SUBCLASSES) {