Patch "cxl: Force psl data-cache flush during device shutdown" has been added to the 4.9-stable tree

Patch "cxl: Force psl data-cache flush during device shutdown" has been added to the 4.9-stable tree

[gregkh]

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;a=summary

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