[v3 4/4] cxl/pci: simplify the check of mem_enabled in cxl_hdm_decode_init()

[Yanfei Xu <yanfei.xu@intel.com>]

Cases can be divided into two categories which are DVSEC range enabled and
not enabled when HDM decoders exist but is not enabled. To avoid checking
info->mem_enabled, which indicates the enablement of DVSEC range, every
time, we can check !info->mem_enabled once in advance. This simplification
can make the code clearer.

No functional change intended.

Signed-off-by: Yanfei Xu <yanfei.xu@intel.com>
---
 drivers/cxl/core/pci.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
index 519989ada48e..be00266c8907 100644
--- a/drivers/cxl/core/pci.c
+++ b/drivers/cxl/core/pci.c
@@ -426,7 +426,15 @@ int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
 		return -ENODEV;
 	}
 
-	for (i = 0, allowed = 0; info->mem_enabled && i < info->ranges; i++) {
+	if (!info->mem_enabled) {
+		rc = devm_cxl_enable_hdm(&port->dev, cxlhdm);
+		if (rc)
+			return rc;
+
+		return devm_cxl_enable_mem(&port->dev, cxlds);
+	}
+
+	for (i = 0, allowed = 0; i < info->ranges; i++) {
 		struct device *cxld_dev;
 
 		cxld_dev = device_find_child(&root->dev, &info->dvsec_range[i],
@@ -440,7 +448,7 @@ int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
 		allowed++;
 	}
 
-	if (!allowed && info->mem_enabled) {
+	if (!allowed) {
 		dev_err(dev, "Range register decodes outside platform defined CXL ranges.\n");
 		return -ENXIO;
 	}
@@ -454,14 +462,7 @@ int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
 	 * match. If at least one DVSEC range is enabled and allowed, skip HDM
 	 * Decoder Capability Enable.
 	 */
-	if (info->mem_enabled)
-		return 0;
-
-	rc = devm_cxl_enable_hdm(&port->dev, cxlhdm);
-	if (rc)
-		return rc;
-
-	return devm_cxl_enable_mem(&port->dev, cxlds);
+	return 0;
 }
 EXPORT_SYMBOL_NS_GPL(cxl_hdm_decode_init, CXL);
 
-- 
2.39.2