2 files changed, 7 insertions, 2 deletions

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index e43747a9926f..acde00c8fdb4 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -1706,8 +1706,8 @@ static void xgbe_config_mtl_mode(struct xgbe_prv_data *pdata)
         XGMAC_IOWRITE_BITS(pdata, MTL_OMR, RAA, MTL_RAA_SP);
 }
 
-static unsigned int xgbe_calculate_per_queue_fifo(unsigned long fifo_size,
-                                                  unsigned char queue_count)
+static unsigned int xgbe_calculate_per_queue_fifo(unsigned int fifo_size,
+                                                  unsigned int queue_count)
 {
         unsigned int q_fifo_size = 0;
         enum xgbe_mtl_fifo_size p_fifo = XGMAC_MTL_FIFO_SIZE_256;
@@ -1751,6 +1751,10 @@ static unsigned int xgbe_calculate_per_queue_fifo(unsigned long fifo_size,
                 q_fifo_size = XGBE_FIFO_SIZE_KB(256);
                 break;
         }
+
+        /* The configured value is not the actual amount of fifo RAM */
+        q_fifo_size = min_t(unsigned int, XGBE_FIFO_MAX, q_fifo_size);
+
         q_fifo_size = q_fifo_size / queue_count;
 
         /* Set the queue fifo size programmable value */
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index 5af5c38eef4b..e9fe6e6ddcc3 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -183,6 +183,7 @@
 #define XGMAC_DRIVER_CONTEXT    1
 #define XGMAC_IOCTL_CONTEXT     2
 
+#define XGBE_FIFO_MAX           81920
 #define XGBE_FIFO_SIZE_B(x)     (x)
 #define XGBE_FIFO_SIZE_KB(x)    (x * 1024)