diff options
Diffstat (limited to 'drivers/cdx/cdx.c')
| -rw-r--r-- | drivers/cdx/cdx.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c index 236d381dc5f7..b39af2f1937f 100644 --- a/drivers/cdx/cdx.c +++ b/drivers/cdx/cdx.c @@ -170,7 +170,7 @@ static int cdx_unregister_device(struct device *dev, return 0; } -static void cdx_unregister_devices(struct bus_type *bus) +static void cdx_unregister_devices(const struct bus_type *bus) { /* Reset all the devices attached to cdx bus */ bus_for_each_dev(bus, NULL, NULL, cdx_unregister_device); @@ -262,10 +262,10 @@ EXPORT_SYMBOL_GPL(cdx_clear_master); * * Return: true on success, false otherwise. */ -static int cdx_bus_match(struct device *dev, struct device_driver *drv) +static int cdx_bus_match(struct device *dev, const struct device_driver *drv) { struct cdx_device *cdx_dev = to_cdx_device(dev); - struct cdx_driver *cdx_drv = to_cdx_driver(drv); + const struct cdx_driver *cdx_drv = to_cdx_driver(drv); const struct cdx_device_id *found_id = NULL; const struct cdx_device_id *ids; @@ -310,7 +310,7 @@ static int cdx_probe(struct device *dev) * Setup MSI device data so that generic MSI alloc/free can * be used by the device driver. */ - if (cdx->msi_domain) { + if (IS_ENABLED(CONFIG_GENERIC_MSI_IRQ) && cdx->msi_domain) { error = msi_setup_device_data(&cdx_dev->dev); if (error) return error; @@ -338,7 +338,10 @@ static void cdx_shutdown(struct device *dev) { struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver); struct cdx_device *cdx_dev = to_cdx_device(dev); + struct cdx_controller *cdx = cdx_dev->cdx; + if (cdx_dev->is_bus && cdx_dev->enabled && cdx->ops->bus_disable) + cdx->ops->bus_disable(cdx, cdx_dev->bus_num); if (cdx_drv && cdx_drv->shutdown) cdx_drv->shutdown(cdx_dev); } @@ -357,7 +360,8 @@ static int cdx_dma_configure(struct device *dev) return ret; } - if (!ret && !cdx_drv->driver_managed_dma) { + /* @cdx_drv may not be valid when we're called from the IOMMU layer */ + if (!ret && dev->driver && !cdx_drv->driver_managed_dma) { ret = iommu_device_use_default_domain(dev); if (ret) arch_teardown_dma_ops(dev); @@ -470,8 +474,12 @@ static ssize_t driver_override_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cdx_device *cdx_dev = to_cdx_device(dev); + ssize_t len; - return sysfs_emit(buf, "%s\n", cdx_dev->driver_override); + device_lock(dev); + len = sysfs_emit(buf, "%s\n", cdx_dev->driver_override); + device_unlock(dev); + return len; } static DEVICE_ATTR_RW(driver_override); @@ -643,7 +651,7 @@ static struct attribute *cdx_bus_attrs[] = { }; ATTRIBUTE_GROUPS(cdx_bus); -struct bus_type cdx_bus_type = { +const struct bus_type cdx_bus_type = { .name = "cdx", .match = cdx_bus_match, .probe = cdx_probe, @@ -707,7 +715,7 @@ static const struct vm_operations_struct cdx_phys_vm_ops = { * Return: true on success, false otherwise. */ static int cdx_mmap_resource(struct file *fp, struct kobject *kobj, - struct bin_attribute *attr, + const struct bin_attribute *attr, struct vm_area_struct *vma) { struct cdx_device *cdx_dev = to_cdx_device(kobj_to_dev(kobj)); @@ -825,7 +833,7 @@ int cdx_device_add(struct cdx_dev_params *dev_params) ((cdx->id << CDX_CONTROLLER_ID_SHIFT) | (cdx_dev->bus_num & CDX_BUS_NUM_MASK)), cdx_dev->dev_num); - if (cdx->msi_domain) { + if (IS_ENABLED(CONFIG_GENERIC_MSI_IRQ) && cdx->msi_domain) { cdx_dev->num_msi = dev_params->num_msi; dev_set_msi_domain(&cdx_dev->dev, cdx->msi_domain); } @@ -868,7 +876,7 @@ fail: return ret; } -EXPORT_SYMBOL_NS_GPL(cdx_device_add, CDX_BUS_CONTROLLER); +EXPORT_SYMBOL_NS_GPL(cdx_device_add, "CDX_BUS_CONTROLLER"); struct device *cdx_bus_add(struct cdx_controller *cdx, u8 bus_num) { @@ -915,7 +923,7 @@ device_add_fail: return NULL; } -EXPORT_SYMBOL_NS_GPL(cdx_bus_add, CDX_BUS_CONTROLLER); +EXPORT_SYMBOL_NS_GPL(cdx_bus_add, "CDX_BUS_CONTROLLER"); int cdx_register_controller(struct cdx_controller *cdx) { @@ -940,7 +948,7 @@ int cdx_register_controller(struct cdx_controller *cdx) return 0; } -EXPORT_SYMBOL_NS_GPL(cdx_register_controller, CDX_BUS_CONTROLLER); +EXPORT_SYMBOL_NS_GPL(cdx_register_controller, "CDX_BUS_CONTROLLER"); void cdx_unregister_controller(struct cdx_controller *cdx) { @@ -955,7 +963,7 @@ void cdx_unregister_controller(struct cdx_controller *cdx) mutex_unlock(&cdx_controller_lock); } -EXPORT_SYMBOL_NS_GPL(cdx_unregister_controller, CDX_BUS_CONTROLLER); +EXPORT_SYMBOL_NS_GPL(cdx_unregister_controller, "CDX_BUS_CONTROLLER"); static int __init cdx_bus_init(void) { |