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PCI: Add 'override_only' field to struct pci_device_id

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Add 'override_only' field to struct pci_device_id to be used as part of
pci_match_device().

When set, a driver only matches the entry when dev->driver_override is
set to that driver.

In addition, add a helper macro named 'PCI_DEVICE_DRIVER_OVERRIDE' to
enable setting some data on it.

Next patch from this series will use the above functionality.

Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20210826103912.128972-10-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Max Gurtovoy 2021-08-26 13:39:08 +03:00 • committed by Alex Williamson
parent c61302aa48
commit 343b725868
4 changed files with 39 additions and 7 deletions
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2
include/linux/mod_devicetable.h
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@ -34,12 +34,14 @@ typedef unsigned long kernel_ulong_t;
* Best practice is to use driver_data as an index
* into a static list of equivalent device types,
* instead of using it as a pointer.
* @override_only: Match only when dev->driver_override is this driver.
*/
struct pci_device_id {
__u32 vendor, device; /* Vendor and device ID or PCI_ANY_ID*/
__u32 subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
__u32 class, class_mask; /* (class,subclass,prog-if) triplet */
kernel_ulong_t driver_data; /* Data private to the driver */
__u32 override_only;
};