Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 16/87] cxl: Force psl data-cache flush during device shutdown | Date | Mon, 13 Nov 2017 13:55:33 +0100 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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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);
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