This is a note to let you know that I've just added the patch titled
cxl: Force psl data-cache flush during device shutdown
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: cxl-force-psl-data-cache-flush-during-device-shutdown.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Thu Nov 9 09:48:01 CET 2017
From: Vaibhav Jain vaibhav@linux.vnet.ibm.com Date: Wed, 4 Jan 2017 11:48:52 +0530 Subject: cxl: Force psl data-cache flush during device shutdown
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);
Patches currently in stable-queue which might be from vaibhav@linux.vnet.ibm.com are
queue-4.9/cxl-force-psl-data-cache-flush-during-device-shutdown.patch