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cxl: Introduce put_cxl_root() helper

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Add a helper function put_cxl_root() to maintain symmetry for
find_cxl_root() function instead of relying on open coding of the
put_device() in order to dereference the 'struct device' that happens via
get_device() in find_cxl_root().

Suggested-by: Robert Richter <rrichter@amd.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Robert Richter <rrichter@amd.com>
Link: https://lore.kernel.org/r/170449245417.3779673.4566146351673989387.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2024-01-05 15:07:34 -07:00 committed by Dan Williams
parent 185c1a489f
commit 98856b2ea3
2 changed files with 12 additions and 0 deletions
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9
drivers/cxl/core/port.c
View File

@ -986,6 +986,15 @@ struct cxl_port *find_cxl_root(struct cxl_port *port)
}
EXPORT_SYMBOL_NS_GPL(find_cxl_root, CXL);
void put_cxl_root(struct cxl_root *cxl_root)
{
if (!cxl_root)
return;
put_device(&cxl_root->port.dev);
}
EXPORT_SYMBOL_NS_GPL(put_cxl_root, CXL);
static struct cxl_dport *find_dport(struct cxl_port *port, int id)
{
struct cxl_dport *dport;

3
drivers/cxl/cxl.h
View File

@ -735,6 +735,9 @@ struct cxl_port *devm_cxl_add_port(struct device *host,
struct cxl_root *devm_cxl_add_root(struct device *host,
const struct cxl_root_ops *ops);
struct cxl_port *find_cxl_root(struct cxl_port *port);
void put_cxl_root(struct cxl_root *cxl_root);
DEFINE_FREE(put_cxl_root, struct cxl_root *, if (_T) put_cxl_root(_T))
int devm_cxl_enumerate_ports(struct cxl_memdev *cxlmd);
void cxl_bus_rescan(void);
void cxl_bus_drain(void);