4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Vaibhav Jain <vaib...@linux.vnet.ibm.com>
[ 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 <vaib...@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnel...@au1.ibm.com>
Acked-by: Frederic Barrat <fbar...@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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);
