1 files changed, 12 insertions, 9 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 623ebc50fe6b..7a0072003f34 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -71,19 +71,22 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
                 plat->force_sf_dma_mode = 1;
         }
 
-        dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), GFP_KERNEL);
-        if (!dma_cfg)
-                return -ENOMEM;
-
-        plat->dma_cfg = dma_cfg;
-        of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
-        dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
-        dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
+        if (of_find_property(np, "snps,pbl", NULL)) {
+                dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
+                                       GFP_KERNEL);
+                if (!dma_cfg)
+                        return -ENOMEM;
+                plat->dma_cfg = dma_cfg;
+                of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
+                dma_cfg->fixed_burst =
+                        of_property_read_bool(np, "snps,fixed-burst");
+                dma_cfg->mixed_burst =
+                        of_property_read_bool(np, "snps,mixed-burst");
+        }
         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
         if (plat->force_thresh_dma_mode) {
                 plat->force_sf_dma_mode = 0;
                 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
-        }
 
         return 0;
 }