[PATCH V2 04/11] cxl/mem: Clear events on driver load

ira.weiny
2022-12-01T00:27:52Z

From: Ira Weiny <ira.weiny@intel.com>

The information contained in the events prior to the driver loading can
be queried at any time through other mailbox commands.

Ensure a clean slate of events by reading and clearing the events. The
events are sent to the trace buffer but it is not anticipated to have
anyone listening to it at driver load time.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
drivers/cxl/pci.c | 2 ++
tools/testing/cxl/test/mem.c | 2 ++
2 files changed, 4 insertions(+)

diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 8f86f85d89c7..11e95a95195a 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -521,6 +521,8 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);

+ cxl_mem_get_event_records(cxlds);
+
if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM))
rc = devm_cxl_add_nvdimm(&pdev->dev, cxlmd);

diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index aa2df3a15051..e2f5445d24ff 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -285,6 +285,8 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);

+ cxl_mem_get_event_records(cxlds);
+
if (resource_size(&cxlds->pmem_res) && IS_ENABLED(CONFIG_CXL_PMEM))
rc = devm_cxl_add_nvdimm(dev, cxlmd);

--
2.37.2