prov/efa: Reset g_efa_hmem_info after each test

Several tests directly modify g_efa_hmem_info which is only correctly
set once on the first fi_getinfo call

Signed-off-by: Sai Sunku <sunkusa@amazon.com>

prov/efa/test/efa_unit_tests.c

@@ -4,16 +4,22 @@
 #include "efa_unit_tests.h"
 
 struct efa_env orig_efa_env = {0};
+struct efa_hmem_info g_efa_hmem_info_backup[OFI_HMEM_MAX];
 
 /* Runs once before all tests */
 static int efa_unit_test_mocks_group_setup(void **state)
 {
 	struct efa_resource *resource;
+	struct fi_info *info;
 	resource = calloc(1, sizeof(struct efa_resource));
 	*state = resource;
 
 	orig_efa_env = efa_env;
 
+	/* run fi_getinfo to populate g_efa_hmem_info and copy it */
+	fi_getinfo(FI_VERSION(2, 0), NULL, NULL, 0, NULL, &info);
+	memcpy(g_efa_hmem_info_backup, g_efa_hmem_info, sizeof(g_efa_hmem_info));
+
 	return 0;
 }
 
@@ -41,6 +47,9 @@ static int efa_unit_test_mocks_teardown(void **state)
 {
 	struct efa_resource *resource = *state;
 
+	/* Reset the contents of g_efa_hmem_info from backup */
+	memcpy(g_efa_hmem_info, g_efa_hmem_info_backup, sizeof(g_efa_hmem_info));
+
 	efa_unit_test_resource_destruct(resource);
 
 	efa_ibv_submitted_wr_id_vec_clear();