diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c
index e15f9e37716ada1b65ac7f4a2e3561e312dc097e..0c70f8293341c9aee6f7cc5e6206b57c51ef8742 100644
--- a/drivers/i2c/busses/i2c-amd8111.c
+++ b/drivers/i2c/busses/i2c-amd8111.c
@@ -254,7 +254,8 @@ static s32 amd8111_access(struct i2c_adapter * adap, u16 addr,
 			break;
 
 		case I2C_SMBUS_BLOCK_PROC_CALL:
-			len = min_t(u8, data->block[0], 31);
+			len = min_t(u8, data->block[0],
+				    I2C_SMBUS_BLOCK_MAX - 1);
 			amd_ec_write(smbus, AMD_SMB_CMD, command);
 			amd_ec_write(smbus, AMD_SMB_BCNT, len);
 			for (i = 0; i < len; i++)