4.9-stable review patch. If anyone has any objections, please let me know.
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From: Vaibhav Jain vaibhav@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 vaibhav@linux.vnet.ibm.com Reviewed-by: Andrew Donnellan andrew.donnellan@au1.ibm.com Acked-by: Frederic Barrat fbarrat@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@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);