cxl: Update prototype of function get_support_feature_info()

JIRA: https://issues.redhat.com/browse/RHEL-107284

commit f76e0bb
Author: Shiju Jose <shiju.jose@huawei.com>
Date:   Wed May 21 13:47:40 2025 +0100

    cxl: Update prototype of function get_support_feature_info()

    Add following changes to function get_support_feature_info()
    1. Make generic to share between cxl-fwctl and cxl-edac paths.
    2. Rename get_support_feature_info() to cxl_feature_info()
    3. Change parameter const struct fwctl_rpc_cxl *rpc_in to
       const uuid_t *uuid.

    Suggested-by: Dan Williams <dan.j.williams@intel.com>
    Reviewed-by: Dave Jiang <dave.jiang@intel.com>
    Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
    Reviewed-by: Fan Ni <fan.ni@samsung.com>
    Reviewed-by: Alison Schofield <alison.schofield@intel.com>
    Acked-by: Dan Williams <dan.j.williams@intel.com>
    Link: https://patch.msgid.link/20250521124749.817-3-shiju.jose@huawei.com
    Signed-off-by: Dave Jiang <dave.jiang@intel.com>

Signed-off-by: John W. Linville <linville@redhat.com>

Author: John W. Linville

drivers/cxl/core/core.h

@@ -123,6 +123,8 @@ int cxl_acpi_get_extended_linear_cache_size(struct resource *backing_res,
 					    int nid, resource_size_t *size);
 
 #ifdef CONFIG_CXL_FEATURES
+struct cxl_feat_entry *
+cxl_feature_info(struct cxl_features_state *cxlfs, const uuid_t *uuid);
 size_t cxl_get_feature(struct cxl_mailbox *cxl_mbox, const uuid_t *feat_uuid,
 		       enum cxl_get_feat_selection selection,
 		       void *feat_out, size_t feat_out_size, u16 offset,

drivers/cxl/core/features.c

@@ -365,17 +365,11 @@ static void cxlctl_close_uctx(struct fwctl_uctx *uctx)
 {
 }
 
-static struct cxl_feat_entry *
-get_support_feature_info(struct cxl_features_state *cxlfs,
-			 const struct fwctl_rpc_cxl *rpc_in)
+struct cxl_feat_entry *
+cxl_feature_info(struct cxl_features_state *cxlfs,
+		 const uuid_t *uuid)
 {
 	struct cxl_feat_entry *feat;
-	const uuid_t *uuid;
-
-	if (rpc_in->op_size < sizeof(uuid))
-		return ERR_PTR(-EINVAL);
-
-	uuid = &rpc_in->set_feat_in.uuid;
 
 	for (int i = 0; i < cxlfs->entries->num_features; i++) {
 		feat = &cxlfs->entries->ent[i];
@@ -549,7 +543,10 @@ static bool cxlctl_validate_set_features(struct cxl_features_state *cxlfs,
 	struct cxl_feat_entry *feat;
 	u32 flags;
 
-	feat = get_support_feature_info(cxlfs, rpc_in);
+	if (rpc_in->op_size < sizeof(uuid_t))
+		return ERR_PTR(-EINVAL);
+
+	feat = cxl_feature_info(cxlfs, &rpc_in->set_feat_in.uuid);
 	if (IS_ERR(feat))
 		return false;