From: Vaibhav Jain <vaibhav@xxxxxxxxxxxxxxxxxx> [ Upstream commit d7b1946c7925a270062b2e0718aa57b42ba619c0 ] This change adds a force psl data cache flush during device shutdown callback. This should reduce a possibility of psl holding a dirty cache line while the CAPP is being reinitialized, which may result in a UE [load/store] machine check error. Signed-off-by: Vaibhav Jain <vaibhav@xxxxxxxxxxxxxxxxxx> Reviewed-by: Andrew Donnellan <andrew.donnellan@xxxxxxxxxxx> Acked-by: Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> --- drivers/misc/cxl/pci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index fa4fe02cfef4..eef202d4399b 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -1620,6 +1620,9 @@ static void cxl_pci_remove_adapter(struct cxl *adapter) cxl_sysfs_adapter_remove(adapter); cxl_debugfs_adapter_remove(adapter); + /* Flush adapter datacache as its about to be removed */ + cxl_data_cache_flush(adapter); + cxl_deconfigure_adapter(adapter); device_unregister(&adapter->dev); -- 2.11.0