4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Vaibhav Jain <[email protected]> [ 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 <[email protected]> Reviewed-by: Andrew Donnellan <[email protected]> Acked-by: Frederic Barrat <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/misc/cxl/pci.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -1620,6 +1620,9 @@ static void cxl_pci_remove_adapter(struc 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);
