[libvirt] [PATCH 08/19] util: new function virPCIDeviceRebind()

This function unbinds a device from its driver, then immediately rebinds it to its driver again. --- src/libvirt_private.syms | 1 + src/util/virpci.c | 25 +++++++++++++++++++++++++ src/util/virpci.h | 1 + 3 files changed, 27 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index b44a6ee..ef027cc 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2217,6 +2217,7 @@ virPCIDeviceListSteal; virPCIDeviceListStealIndex; virPCIDeviceNew; virPCIDeviceReattach; +virPCIDeviceRebind; virPCIDeviceReset; virPCIDeviceSetManaged; virPCIDeviceSetRemoveSlot; diff --git a/src/util/virpci.c b/src/util/virpci.c index 9878398..a007eea 100644 --- a/src/util/virpci.c +++ b/src/util/virpci.c @@ -1101,6 +1101,31 @@ virPCIDeviceUnbind(virPCIDevicePtr dev) return ret; } + +/** + * virPCIDeviceRebind: + * @dev: virPCIDevice object describing the device to rebind + * + * unbind a device from its driver, then immediately rebind it. + * + * Returns 0 on success, -1 on failure + */ +int virPCIDeviceRebind(virPCIDevicePtr dev) +{ + if (virPCIDeviceUnbind(dev) < 0) + return -1; + + if (virFileWriteStr(PCI_SYSFS "drivers_probe", dev->name, 0) < 0) { + virReportSystemError(errno, + _("Failed to trigger a probe for PCI device '%s'"), + dev->name); + return -1; + } + + return 0; +} + + /* * Bind a PCI device to a driver using driver_override sysfs interface. * E.g. diff --git a/src/util/virpci.h b/src/util/virpci.h index 4be9cc0..8637c2c 100644 --- a/src/util/virpci.h +++ b/src/util/virpci.h @@ -225,6 +225,7 @@ int virPCIGetVirtualFunctionInfo(const char *vf_sysfs_device_path, char **pfname, int *vf_index); int virPCIDeviceUnbind(virPCIDevicePtr dev); +int virPCIDeviceRebind(virPCIDevicePtr dev); int virPCIDeviceGetDriverPathAndName(virPCIDevicePtr dev, char **path, char **name); -- 2.9.3