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authorVaibhav Jain <vaibhav@linux.vnet.ibm.com>2017-01-04 11:48:52 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-11-15 15:53:13 +0100
commit870b502a02086d22274403df7d39f1cd693594f7 (patch)
tree60773a6683e732588066c740b1217577c96b7b2e /drivers/misc
parentf88f299a94e02d6beee034d5421016a974783ee2 (diff)
cxl: Force psl data-cache flush during device shutdown
[ 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>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/cxl/pci.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index fa4fe02cfef4..eef202d4399b 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1620,6 +1620,9 @@ 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);