Commit d7b1946c authored Jan 04, 2017 by Vaibhav Jain Committed by Michael Ellerman Jan 25, 2017

cxl: Force psl data-cache flush during device shutdown



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>

parent 0e17166d

drivers/misc/cxl/pci.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1610,6 +1610,9 @@ static void cxl_pci_remove_adapter(struct cxl *adapter)
	cxl_sysfs_adapter_remove(adapter);		cxl_sysfs_adapter_remove(adapter);
	cxl_debugfs_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);		cxl_deconfigure_adapter(adapter);

	device_unregister(&adapter->dev);		device_unregister(&adapter->dev);

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