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4255c30fe8
The Dell SMBIOS WMI interface will fail for some more complex calls unless a WMI hotfix has been included. Most platforms have this fix available in a maintenance BIOS release. In the case the driver is loaded on a platform without this fix, disable the userspace interface. A hotfix indicator is present in the dell-wmi-descriptor that represents whether or not more complex calls will work properly. "Simple" calls such as those used by dell-laptop and dell-wmi will continue to work properly so dell-smbios-wmi should not be blocked from binding and being used as the dell-smbios dispatcher. Suggested-by: Girish Prakash <girish.prakash@dell.com> Signed-off-by: Mario Limonciello <mario.limonciello@dell.com> Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
29 lines
780 B
C
29 lines
780 B
C
/*
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* Dell WMI descriptor driver
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*
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* Copyright (c) 2017 Dell Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DELL_WMI_DESCRIPTOR_H_
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#define _DELL_WMI_DESCRIPTOR_H_
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#include <linux/wmi.h>
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/* possible return values:
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* -ENODEV: Descriptor GUID missing from WMI bus
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* -EPROBE_DEFER: probing for dell-wmi-descriptor not yet run
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* 0: valid descriptor, successfully probed
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* < 0: invalid descriptor, don't probe dependent devices
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*/
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int dell_wmi_get_descriptor_valid(void);
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bool dell_wmi_get_interface_version(u32 *version);
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bool dell_wmi_get_size(u32 *size);
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bool dell_wmi_get_hotfix(u32 *hotfix);
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#endif
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