[NDCTL PATCH resend v2 1/3] cxl: Add cxl_bus_get_by_provider()

[Dave Jiang <dave.jiang@intel.com>]

Add helper function cxl_bus_get_by_provider() in order to support unit
test that will utilize the API call.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 cxl/lib/libcxl.c   | 11 +++++++++++
 cxl/lib/libcxl.sym |  5 +++++
 cxl/libcxl.h       |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index 63aa4ef3acdc..bab7343e8a4a 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -3358,6 +3358,17 @@ CXL_EXPORT struct cxl_ctx *cxl_bus_get_ctx(struct cxl_bus *bus)
 	return cxl_port_get_ctx(&bus->port);
 }
 
+CXL_EXPORT struct cxl_bus *cxl_bus_get_by_provider(struct cxl_ctx *ctx,
+						   const char *provider)
+{
+	struct cxl_bus *bus;
+
+	cxl_bus_foreach(ctx, bus)
+		if (strcmp(provider, cxl_bus_get_provider(bus)) == 0)
+			return bus;
+	return NULL;
+}
+
 CXL_EXPORT void cxl_cmd_unref(struct cxl_cmd *cmd)
 {
 	if (!cmd)
diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
index 0c155a40ad47..1fc33cc6e1a4 100644
--- a/cxl/lib/libcxl.sym
+++ b/cxl/lib/libcxl.sym
@@ -288,3 +288,8 @@ global:
 	cxl_memdev_trigger_poison_list;
 	cxl_region_trigger_poison_list;
 } LIBCXL_7;
+
+LIBCXL_9 {
+global:
+	cxl_bus_get_by_provider;
+} LIBECXL_8;
diff --git a/cxl/libcxl.h b/cxl/libcxl.h
index 0a5fd0e13cc2..3b309968a808 100644
--- a/cxl/libcxl.h
+++ b/cxl/libcxl.h
@@ -122,6 +122,8 @@ int cxl_bus_get_id(struct cxl_bus *bus);
 struct cxl_port *cxl_bus_get_port(struct cxl_bus *bus);
 struct cxl_ctx *cxl_bus_get_ctx(struct cxl_bus *bus);
 int cxl_bus_disable_invalidate(struct cxl_bus *bus);
+struct cxl_bus *cxl_bus_get_by_provider(struct cxl_ctx *ctx,
+					const char *provider);
 
 #define cxl_bus_foreach(ctx, bus)                                              \
 	for (bus = cxl_bus_get_first(ctx); bus != NULL;                        \
-- 
2.48.1