diff --git a/drivers/spi/rk_spi.c b/drivers/spi/rk_spi.c
index 1df497d..e7b2df8 100644
--- a/drivers/spi/rk_spi.c
+++ b/drivers/spi/rk_spi.c
@@ -356,7 +356,7 @@
 		spi_cs_activate(dev, slave_plat->cs);
 
 	while (len > 0) {
-		int todo = min(len, 0xffff);
+		int todo = min(len, 0x10000);
 
 		rkspi_enable_chip(regs, false);
 		writel(todo - 1, &regs->ctrlr1);