[Xen-devel] [PATCH] xen/pciback: support driver_override

[Juergen Gross <jgross@xxxxxxxx>]

Support the driver_override scheme introduced with commit 782a985d7af2
("PCI: Introduce new device binding path using pci_dev.driver_override")

As pcistub_probe() is called for all devices (it has to check for a
match based on the slot address rather than device type) it has to
check for driver_override set to "pciback" itself.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 drivers/xen/xen-pciback/pci_stub.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/xen/xen-pciback/pci_stub.c 
b/drivers/xen/xen-pciback/pci_stub.c
index 258b7c3..8193868 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -25,6 +25,8 @@
 #include "conf_space.h"
 #include "conf_space_quirks.h"
 
+#define PCISTUB_DRIVER_NAME "pciback"
+
 static char *pci_devs_to_hide;
 wait_queue_head_t xen_pcibk_aer_wait_queue;
 /*Add sem for sync AER handling and xen_pcibk remove/reconfigue ops,
@@ -529,15 +531,17 @@ static int pcistub_probe(struct pci_dev *dev, const 
struct pci_device_id *id)
                                "don't have a normal (0) or bridge (1) "
                                "header type!\n");
                        err = -ENODEV;
-                       goto out;
                }
 
+       } else if (!dev->driver_override ||
+                  strcmp(dev->driver_override, PCISTUB_DRIVER_NAME))
+               /* Didn't find the device */
+               err = -ENODEV;
+
+       if (!err) {
                dev_info(&dev->dev, "seizing device\n");
                err = pcistub_seize(dev);
-       } else
-               /* Didn't find the device */
-               err = -ENODEV;
-
+       }
 out:
        return err;
 }
@@ -945,7 +949,7 @@ static const struct pci_error_handlers 
xen_pcibk_error_handler = {
 static struct pci_driver xen_pcibk_pci_driver = {
        /* The name should be xen_pciback, but until the tools are updated
         * we will keep it as pciback. */
-       .name = "pciback",
+       .name = PCISTUB_DRIVER_NAME,
        .id_table = pcistub_ids,
        .probe = pcistub_probe,
        .remove = pcistub_remove,
-- 
2.6.6


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