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cxl: Force psl data-cache flush during device shutdown

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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>
This commit is contained in:
Vaibhav Jain 2017-01-04 11:48:52 +05:30 committed by Michael Ellerman
parent 0e17166d37
commit d7b1946c79
1 changed files with 3 additions and 0 deletions
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3
drivers/misc/cxl/pci.c
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@ -1610,6 +1610,9 @@ 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);