cxl: fix return value in cxlctl_validate_set_features()

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

commit 87b42c1
Author: Dan Carpenter <dan.carpenter@linaro.org>
Date:   Wed May 28 11:11:41 2025 +0300

    cxl: fix return value in cxlctl_validate_set_features()

    The cxlctl_validate_set_features() function is type bool.  It's supposed
    to return true for valid requests and false for invalid.  However, this
    error path returns ERR_PTR(-EINVAL) which is true when it was intended to
    return false.

    The incorrect return will result in kernel failing to prevent a
    incorrect op_size passed in from userspace to be detected.

    [ dj: Add user impact to commit log ]

    Fixes: f76e0bb ("cxl: Update prototype of function get_support_feature_info()")
    Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
    Reviewed-by: Ira Weiny <ira.weiny@intel.com>
    Link: https://patch.msgid.link/aDbFPSCujpJLY1if@stanley.mountain
    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/features.c

@@ -544,7 +544,7 @@ static bool cxlctl_validate_set_features(struct cxl_features_state *cxlfs,
 	u32 flags;
 
 	if (rpc_in->op_size < sizeof(uuid_t))
-		return ERR_PTR(-EINVAL);
+		return false;
 
 	feat = cxl_feature_info(cxlfs, &rpc_in->set_feat_in.uuid);
 	if (IS_ERR(feat))