diff options
Diffstat (limited to 'drivers/cxl/core/port.c')
| -rw-r--r-- | drivers/cxl/core/port.c | 41 |
1 files changed, 8 insertions, 33 deletions
diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 8ee6b6e2e2a4..da2068475fa2 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -1,6 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright(c) 2020 Intel Corporation. All rights reserved. */ -#include <linux/io-64-nonatomic-lo-hi.h> #include <linux/memregion.h> #include <linux/workqueue.h> #include <linux/debugfs.h> @@ -823,41 +822,17 @@ static bool dev_is_cxl_root_child(struct device *dev) return false; } -/* Find a 2nd level CXL port that has a dport that is an ancestor of @match */ -static int match_root_child(struct device *dev, const void *match) +struct cxl_port *find_cxl_root(struct cxl_port *port) { - const struct device *iter = NULL; - struct cxl_dport *dport; - struct cxl_port *port; - - if (!dev_is_cxl_root_child(dev)) - return 0; - - port = to_cxl_port(dev); - iter = match; - while (iter) { - dport = cxl_find_dport_by_dev(port, iter); - if (dport) - break; - iter = iter->parent; - } - - return !!iter; -} + struct cxl_port *iter = port; -struct cxl_port *find_cxl_root(struct device *dev) -{ - struct device *port_dev; - struct cxl_port *root; + while (iter && !is_cxl_root(iter)) + iter = to_cxl_port(iter->dev.parent); - port_dev = bus_find_device(&cxl_bus_type, NULL, dev, match_root_child); - if (!port_dev) + if (!iter) return NULL; - - root = to_cxl_port(port_dev->parent); - get_device(&root->dev); - put_device(port_dev); - return root; + get_device(&iter->dev); + return iter; } EXPORT_SYMBOL_NS_GPL(find_cxl_root, CXL); @@ -1927,7 +1902,7 @@ bool schedule_cxl_memdev_detach(struct cxl_memdev *cxlmd) EXPORT_SYMBOL_NS_GPL(schedule_cxl_memdev_detach, CXL); /* for user tooling to ensure port disable work has completed */ -static ssize_t flush_store(struct bus_type *bus, const char *buf, size_t count) +static ssize_t flush_store(const struct bus_type *bus, const char *buf, size_t count) { if (sysfs_streq(buf, "1")) { flush_workqueue(cxl_bus_wq); |